Neck fan

ABSTRACT

A neck fan includes an arc-shaped shell and a fan assembly. The arc-shaped shell is configured to be worn around a neck of a user. The shell has a first side and a second side opposite to the first side. Each of the first side and the second side defines air inlets. At least one of the first side and the second side defines air outlets. The shell further defines a receiving space, and the receiving space includes an air duct communicating with the air inlets and outlets. The fan assembly is received in the receiving space and configured to drive the air to flow from the air inlets of both sides, through the air duct, reaching the air outlets.

CROSS-REFERENCE TO RELATED APPLICATIONS

This is a continuation-in-part of U.S. patent application Ser. No.17/471,178, filed on Sep. 10, 2021, which claims priorities of Chinesepatent application No. 202022210032.8 filed on Sep. 30, 2020, and theChinese patent application No. 201921815938.3, filed on Oct. 25, 2019.Contents of the applications are incorporated herein by reference intheir entireties.

TECHNICAL FIELD

The subject matter herein generally relates to fans, and particularlyrelates to a fan hanging around a neck.

BACKGROUND

Fans in the art may include fixed and portable fans. Fixed fans, such asfloor fans, desktop fans and wall-mounted fans, are fixed in a certainplace, and people may be cooled if staying within an air supply area.However, the fans cannot be carried around. Portable fans are availablein the art but tend to have a single structure and a fixed shape. Theuser may be uncomfortable when wearing the fix-shaped portable fan, andhave a poor experience when wearing the fix-shaped portable fan for along period of time.

SUMMARY OF THE INVENTION

In a first aspect, a neck fan includes an arc-shaped shell and a fanassembly. The arc-shaped shell is configured to be worn around a neck ofa user. The shell includes a wall defining a receiving space, and thewall includes a first side wall close to the neck and a second side wallconnected to and opposite to the first side wall. Each of the first sidewall and the second side wall defines a plurality of air inlets, atleast one of the first side wall and the second side wall defines aplurality of air outlets, and the plurality of air inlets and theplurality of air outlets are communicating with the receiving space. Thefan assembly is received in the receiving space of the shell. The fanassembly includes a driving shaft and a fan blade assembly mounted onthe driving shaft. The fan blade assembly is a turbine blade assembly.The turbine blade assembly includes a turbine fan, and the turbine fandefines two inlet windows corresponding to the air inlets of the firstside wall and the second side wall respectively. The receiving spaceincludes a first air duct and a second air duct corresponding to the fanassembly, the plurality of air outlets include a first air outlet and asecond air outlet corresponding to the fan assembly. The first air ductand the first air outlet are located at a first side of the fanassembly. The second air duct and the second air outlet are located at asecond side of the fan assembly. The fan assembly is configured to drivethe air from the plurality of air inlets in the first side wall and thesecond side wall to flow through the first air duct and the second airduct to reach the first air outlet and the second air outlet.

According to a second aspect, a neck fan includes an arc-shaped shelland a fan assembly. The arc-shaped shell is configured to be worn arounda neck of a user. The shell has a first side and a second side oppositeto the first side, the first side and the second side are connected witheach other and cooperatively define a receiving space. Each of the firstside and the second side defines a plurality of air inlets, at least oneof the first side and the second side defines a plurality of airoutlets, and the plurality of air inlets and the plurality of airoutlets are communicating with the receiving space. The fan assemblyincludes a driving shaft and a fan blade assembly mounted on the drivingshaft. The fan blade assembly is a turbine blade assembly. The turbineblade assembly includes a turbine fan, and the turbine fan defines twoinlet windows corresponding to the air inlets of the first side and thesecond side respectively, wherein the fan assembly is configured todrive air from the plurality of air inlets of the first side and thesecond side to flow to the plurality of air outlets. The shell includesa first shell, a second shell, and a third shell, the third shell isdisposed between and connected to the first shell and the second shell.Each of two opposite ends of the third shell is arranged with an angleadjustment assembly. The third shell is connected to each of the firstshell and the second shell through the angle adjustment assembly. Theangle adjustment assembly is configured to adjust an angle between thefirst shell and the third shell and an angle between the second shelland the third shell.

According to a third aspect, a neck fan includes an arc-shaped shell, aninner shell and a fan assembly. The arc-shaped shell is configured to beworn around a neck of a user. The shell has a first side and a secondside opposite to the first side, the first side and the second side areconnected with each other and cooperatively define a receiving space.Each of the first side and the second side defines a plurality of airinlets, at least one of the first side and the second side defines aplurality of air outlets, and the plurality of air inlets and theplurality of air outlets are communicating with the receiving space. Theinner shell is received in the receiving space and defining an innerspace, wherein the inner space communicates with the receiving space,the plurality of air outlets, and the plurality of air inlets; the innershell has two opposite sides, each of the two opposite sides defines atleast one air inlet. The fan assembly is received in the inner space,wherein the fan assembly is configured to drive air from the at leastone air inlet in each of the two opposite sides of the inner shell toflow through the inner space and the receiving space to reach theplurality of air outlets. The air is capable of entering the pluralityof air inlets of the shell along a first flowing direction, the air iscapable of entering the at least of air inlet of the inner shell along asecond flowing direction. An angle between the first flowing directionand the second flowing direction is in a range of 0° to 90°.

According to a fourth aspect, a neck fan includes an arc-shaped shelland a fan assembly. The arc-shaped shell is configured to be worn arounda neck of a user. The shell has a first side and a second side oppositeto the first side, the first side and the second side are connected witheach other and cooperatively define a receiving space. Each of the firstside and the second side defines a plurality of air inlets, at least oneof the first side and the second side defines a plurality of airoutlets, and the plurality of air inlets and the plurality of airoutlets are communicating with the receiving space. The fan assembly isreceived in the receiving space. The fan assembly includes a drivingshaft and a fan blade assembly mounted on the driving shaft. The fanblade assembly is a turbine blade assembly. The turbine blade assemblyincludes a turbine fan, and the turbine fan defines two inlet windowscorresponding to the air inlets of the first side and the second siderespectively, wherein the fan assembly is configured to drive air fromthe plurality of air inlets of the first side and the second side toflow to the plurality of air outlets. The shell includes a first shell,a second shell, and a third shell, the third shell is disposed betweenand connected to the first shell and the second shell. The receivingspace includes a first sub-space, a second sub-space, and a thirdsub-space, the first sub-space is defined in the first shell, the secondsub-space is defined in the second shell, and the third sub-space isdefined in the third shell. Each of the first shell, the second shell,and the third shell defines at least one of the plurality of air inletsand at least one of the plurality of air outlets. The fan assemblyincludes a first fan assembly, a second fan assembly and a third fanassembly. The first fan assembly is received in the first sub-space andis configured to drive the air to flow from the at least one of theplurality of air inlets in the first sub-space to flow to the at leastone of the plurality of air outlets in the first sub-space. The secondfan assembly is received in the second sub-space and is configured todrive the air to flow from the at least one of the plurality of airinlets in the second sub-space to flow to the at least one of theplurality of air outlets in the second sub-space. The third fan assemblyis received in the third sub-space and is configured to drive the air toflow from the at least one of the plurality of air inlets in the thirdsub-space to flow to the at least one of the plurality of air outlets inthe third sub-space.

According to a fifth aspect, a neck fan, includes an arc-shaped shell, afan assembly, and a temperature adjustment assembly. The arc-shapedshell is configured to be worn around a neck of a user. The shell has afirst side and a second side opposite to the first side, the first sideand the second side are connected with each other and cooperativelydefine a receiving space. Each of the first side and the second sidedefines an air inlet, at least one of the first side and the second sidedefines a plurality of air outlets, and the air inlet and the pluralityof air outlets are communicating with the receiving space. The fanassembly is received in the receiving space. The fan assembly includes adriving shaft and a fan blade assembly mounted on the driving shaft. Thefan blade assembly is a turbine blade assembly. The turbine bladeassembly includes a turbine fan, and the turbine fan defines two inletwindows corresponding to the air inlet of the first side and the airinlet of the second side respectively, wherein the fan assembly isconfigured to drive air from the air inlet of the first side and the airinlet of the second side to flow to the plurality of air outlets. Thetemperature adjustment assembly includes: a temperature adjustmentmember, received in the receiving space of the shell and configured tocool or warm the neck.

BRIEF DESCRIPTION OF THE DRAWINGS

Implementations of the present disclosure will now be described, by wayof embodiment, with reference to the attached figures. It should beunderstood, the drawings are shown for illustrative purpose only, forordinary person skilled in the art, other drawings obtained from thesedrawings without paying creative labor by an ordinary person skilled inthe art should be within scope of the present disclosure.

FIG. 1 is a schematic view of a neck fan according to an embodiment ofthe present application.

FIG. 2 is an explosive view of a neck fan according to an embodiment ofthe present application.

FIG. 3 is a schematic view of an inner shell of a neck fan according toan embodiment of the present application.

FIG. 4 is a schematic view of a turbo fan of a neck fan according to anembodiment of the present application.

FIG. 5 is a schematic view of a neck fan in according to a firstembodiment of the present disclosure.

FIG. 6 is an exploded view of the neck fan of FIG. 5.

FIG. 7 is a schematic view of a neck fan in according to a secondembodiment of the present disclosure.

FIG. 8 is an exploded view of the neck fan of FIG. 7.

FIG. 9 is a schematic view of a neck fan according to an embodiment ofthe present disclosure.

FIG. 10 is an exploded view of the embodiment shown in FIG. 9.

FIG. 11 is a schematic view showing connection among an air guidingportion, a neck wearing portion and an adjustment member of a neck fanaccording to the embodiment of the present disclosure.

FIG. 12 is an enlarged view of a portion A shown in FIG. 11.

FIG. 13 is a schematic view showing connection among an air guidingportion, a neck wearing portion, a limitation member, and a rotationshaft of a neck fan according to the embodiment of the presentdisclosure.

FIG. 14 is a cross section view of a neck fan according to theembodiment of the present disclosure.

FIG. 15 is an enlarged view of a portion B shown in FIG. 13.

FIG. 16 is a schematic view of a neck fan in the art.

FIG. 17 is a schematic view of a neck fan according to an embodiment ofthe present disclosure.

FIG. 18 is a schematic view of the neck fan shown in FIG. 17 fromanother view angle.

FIG. 19 is an enlarged view of the neck fan shown in FIG. 17.

FIG. 20 is a schematic view of a portion of the neck fan shown in FIG.17.

FIG. 21 is a cross section view of the neck fan shown in FIG. 17.

FIG. 22 is a cross section view of a neck fan shown according to anotherembodiment of the present disclosure.

FIG. 23 is a structural schematic view of a neck fan according to anembodiment of the present disclosure.

FIG. 24 is an exploded view of a neck fan according to an embodiment ofthe present disclosure.

FIG. 25 is a cross section view of a neck fan according to an embodimentof the present disclosure.

FIG. 26 is a cross section view of a diagonal fan of a neck fanaccording to an embodiment of the present disclosure.

FIG. 27 is a structural schematic view of a wind guide portion of a neckfan according to an embodiment of the present disclosure.

FIG. 28 is a structural schematic view of an air inlet section of a neckfan according to an embodiment of the present disclosure.

FIG. 29 is a structural schematic view of an end of an external shell ofa neck fan according to an embodiment of the present disclosure.

FIG. 30 is a structural schematic view of a neck fan according to anembodiment of the present disclosure.

FIG. 31 is an exploded view of the neck fan shown in FIG. 30.

FIG. 32 is a structural schematic view of a first bracket of a neck fanaccording to an embodiment of the present disclosure.

FIG. 33 is an exploded view of the first bracket and a wind turbine ofthe embodiment shown in FIG. 32.

FIG. 34 illustrates an interior of the first bracket and the windturbine of the embodiment shown in FIG. 33.

FIG. 35 is an enlarged view of a portion A of the embodiment shown inFIG. 34.

FIG. 36 is an exploded view of a second bracket and a wind turbine of aneck fan according to an embodiment of the present disclosure.

FIG. 37 illustrates an interior of a third shell of the embodiment shownin FIG. 36.

FIG. 38 is a schematic view of a neck fan according to an embodiment ofthe present disclosure.

FIG. 39 is an exploded view of the neck fan shown in FIG. 38.

FIG. 40 is an exploded view of connection between an inner shell and afan assembly of a neck fan according to another embodiment of thepresent disclosure.

FIG. 41 is a cross section view of an end portion of an outer shell of aneck fan according to another embodiment of the present disclosure.

FIG. 42 is a schematic view of an inner shell of a neck fan according toanother embodiment of the present disclosure.

FIG. 43 illustrate an interior of an outer shell of a neck fan accordingto another embodiment of the present disclosure.

FIG. 44 is an exploded view of connection among an inner shell, a fanassembly, and a shaking absorption member of a neck fan according toanother embodiment of the present disclosure.

FIG. 45 is a schematic view of a neck fan according to an embodiment ofthe present disclosure.

FIG. 46 is an exploded view of the neck fan shown in FIG. 45.

FIG. 47 is an exploded view of a left head portion of a neck fanaccording to another embodiment of the present disclosure.

FIG. 48 is a schematic view of a neck fan according to an embodiment ofthe present disclosure.

FIG. 49 is a schematic view of the neck fan shown in FIG. 48 fromanother view angle.

FIG. 50 is an exploded view of the neck fan shown in FIG. 48.

FIG. 51 is a schematic view of a portion of the neck fan shown in FIG.48.

FIG. 52 is a schematic view of an outlet adjustment assembly of the neckfan shown in FIG. 48.

FIG. 53 is a schematic view of a neck fan according to an embodiment ofthe present disclosure.

FIG. 54 is an exploded view of the neck fan shown in FIG. 53.

FIG. 55 is an exploded view of the neck fan shown in FIG. 53.

FIG. 56 is an exploded view of connection between a middle connectionportion and a first end head portion of a neck fan according to anembodiment of the present disclosure.

FIG. 57 is a schematic view of a wind guide member of a neck fanaccording to an embodiment of the present disclosure.

FIG. 58 is a schematic view of a neck fan according to a firstembodiment of the present disclosure.

FIG. 59 is an exploded view of the neck fan according to the firstembodiment of the present disclosure.

FIG. 60 is a cross section view of the neck fan according to the firstembodiment of the present disclosure.

FIG. 61 is a schematic view of a fan of the neck fan according to thefirst embodiment of the present disclosure.

FIG. 62 is an exploded view of the neck fan according to the firstembodiment of the present disclosure from another view angle.

FIG. 63 is an exploded view of a neck fan according to a secondembodiment of the present disclosure from another view angle.

FIG. 64 is a schematic view of a neck fan according to a thirdembodiment of the present disclosure from another view angle.

FIG. 65 is an exploded view of the neck fan according to the thirdembodiment of the present disclosure from another view angle.

FIG. 66 is an exploded view of a portion of the neck fan according tothe third embodiment of the present disclosure from another view angle.

FIG. 67 is a schematic view of a neck fan according to an embodiment ofthe present disclosure.

FIG. 68 is a schematic view of the neck fan shown in FIG. 67 fromanother view angle.

FIG. 69 is an exploded view of the neck fan shown in FIG. 67.

FIG. 70 is an exploded view of the neck fan shown in FIG. 68.

FIG. 71 illustrates an inside of a first portion of the neck fan shownin FIG. 67.

FIG. 72 illustrates an inside of a first portion of a neck fan accordingto another embodiment of the present disclosure.

FIG. 73 illustrates an inside of a third portion of the neck fan shownin FIG. 67.

FIG. 74 is a schematic view of a neck fan according to an embodiment ofthe present disclosure.

FIG. 75 is a schematic view of a fan assembly of a neck fan according toan embodiment of the present disclosure.

FIG. 76 is an enlarged view of a portion A shown in FIG. 75.

FIG. 77 is a schematic view of a neck fan according to an embodiment ofthe present disclosure.

FIG. 78 is a cross section view of a portion of the neck fan shown inFIG. 77.

FIG. 79 is a first exploded view of the neck fan shown in FIG. 77.

FIG. 80 is a second exploded view of the neck fan shown in FIG. 77.

FIG. 81 is a schematic view of a temperature adjustment apparatus thathang around a user's neck according to an embodiment of the presentdisclosure.

FIG. 82 is another schematic view of the temperature adjustmentapparatus shown in FIG. 81.

FIG. 83 is an exploded view of the temperature adjustment apparatusshown in FIG. 81.

FIG. 84 is an exploded view of a middle portion of the temperatureadjustment apparatus shown in FIG. 81.

FIG. 85 is another exploded view of a middle portion of the temperatureadjustment apparatus shown in FIG. 81.

FIG. 86 is a diagram of a circuit of the temperature adjustmentapparatus shown in FIG. 81.

DETAILED DESCRIPTION

It will be appreciated that for simplicity and clarity of illustration,where appropriate, reference numerals have been repeated among thedifferent figures to indicate corresponding or analogous elements. Inaddition, numerous specific details are set forth in order to provide athorough understanding of the exemplary embodiments described herein.However, it will be understood by those of ordinary skill in the artthat the exemplary embodiments described herein may be practiced withoutthese specific details. In other instances, methods, procedures, andcomponents have not been described in detail so as not to obscure therelated relevant feature being described. Also, the description is notto be considered as limiting the scope of the exemplary embodimentsdescribed herein. The drawings are not necessarily to scale and theproportions of certain parts may be exaggerated to better illustratedetails and features of the present disclosure.

The term “comprising” when utilized, means “including, but notnecessarily limited to”; it specifically indicates open-ended inclusionor membership in the so-described combination, group, series, and thelike. The disclosure is illustrated by way of example and not by way oflimitation in the figures of the accompanying drawings in which likereferences indicate similar elements. It should be noted that referencesto “an” or “one” embodiment in this disclosure are not necessarily tothe same embodiment, and such references can mean “at least one”. Inaddition, the terms “first” and “second” are used for descriptivepurposes only and cannot be understood as indicating or implyingrelative importance or implying the number of indicated technicalfeatures. Thus, the features defined as “first” and “second” mayexplicitly or implicitly include one or more of the said features. Inthe description of embodiments of the invention, “a plurality of” meanstwo or more, unless otherwise specifically defined.

In an embodiment, as shown in FIGS. 1 and 2, the present disclosureprovides a neck fan including a body portion 1 and a fan assembly 2. Thebody portion 1 may be worn around a neck of a user. The body portion 1defines an air duct 11. The body portion 1 defines a plurality of airoutlets 12 communicating with the an outside of the neck fan and the airduct 11. In this way, air in the air duct 11 may flow to the outsidethrough the air outlets 12. The fan assembly 2 is mounted on the bodyportion 1 and is configured to drive the air from the outside into theair duct 11 and blow the air to the outside through the air outlets 12.The air driven into the air duct 11 through fan assembly 2 has a certainspeed. Therefore, a wind pressure difference is present between aninside and the outside of air outlets 12, i.e., between the air duct andthe outside. In this case, while the air is being blown to the outsidethrough the air outlets 12, due to the wind pressure difference, some ofthe air in the air duct 11 may flow out of the air duct 11 through airoutlets 12 to reach the neck to cool the user. In an embodiment, theplurality of air outlets 12 are evenly distributed and spaced apart fromeach other. Therefore, when being worn, the body portion 1 surrounds afront, a side and a back of the neck, and the air blown out from the airoutlets 12 may be directed to the front, the side and the back of theneck. In this way, a range that the air may reach is expanded, and theuser may be cooled from various directions. The neck fan is highlyapplicable and may be used conveniently.

As shown in FIG. 1, the body portion 1 may be bent and tubular and maybe made of an elastic material that can be extended and retracted. Whenputting on the body portion, two ends of the body portion 1 may bepulled apart from each other to form a gap, and a size of the gap may begreater than a size (such as a diameter) of the neck. After the neck fanis worn to the neck, the body portion may be reset, i.e., the two endsmay be reset to original positions, and the gap between the two ends ofthe body portion may be reduced. In some embodiments, when the two endsare at the original positions, the two ends may be spaced apart fromeach other, and a size of the gap therebetween may be less than the sizeof the neck. In some embodiments, when the two ends of the body portionare at the original positions, the two ends may be connected to eachother, such that the body portion is ring-shaped (such as forming anenclosed circle). The body portion 1 may be made of plastic. The usermay carry the body portion easily and may feel comfortable when wearingthe body portion. The air outlets 12 are oriented towards an insideand/or a top of the bent and tubular body portion. Therefore, whilebeing worn, the neck does not cover the air outlets 12, allowing the airto be blown out the air outlets 12 to the neck smoothly. In detail, someof the air outlets 12 defined in the body portion 1 are oriented towardsthe inside of the tubular body portion, and some of the air outlets 12are oriented towards the top of the tubular body portion 1, increasing arange covered by the air supplied from the air outlets 12.

As shown in FIGS. 1 to 3, each of two ends of the body portion 1 definesa mounting cavity 13. The fan assembly 2 is received in the mountingcavity 13 to be mounted with the body portion 1. A portion of the bodyportion 1 corresponding to the mounting cavity 13 defines an air inlet131. The fan assembly 2 is fixedly received in the mounting cavity 13.When the fan assembly 2 is operating, the fan assembly 2 draws in theoutside air through the air inlet 131, and is configured to acceleratethe air to drive the air to flow into the air duct 11. In the presentembodiment, two ends of the body portion 1 define two mounting cavities13, and two fan assemblies 2 may be received in the two mountingcavities 13, respectively. Each of the two fan assemblies 2 may operateindependently. A plate 111 may be arranged in a middle of the air duct11 to divide the air duct 11 into two sections. One of the two sectionsof the air duct 11 corresponds to one of the two fan assemblies 2. Byarranging the plate 111, a length of the air duct 11 may be reducedeffectively, ensuring an air velocity at an air outlet 12, which isfurther away from the fan assembly 2.

As shown in FIGS. 2 and 4, the fan assembly 2 includes a fan blade 21, amotor (not shown in the figures) which drives the fan blade 21 to rotateto generate an air flow, a battery 22 which provides power to the motor,a main control circuit board 23 which controls a rotation speed of themotor, and a gear switch 24 electrically connected to the main controlcircuit board 23. When the neck fan needs to be initiated, the gearswitch 24 may be pressed, and the main control circuit board 23 mayreceive a signal from the gear switch 24. After receiving the signal,the main control circuit board 23 controls the motor to rotate to drivethe fan blade 21 to rotate. Rotation of the fan blade 21 may lead theair at the outside to flow into the fan assembly 2 under the windpressure, and the air may be guided by the fan assembly 2 to flow intothe air duct 11. When the wind speed of the air flowing out of the airoutlets 12 needs to be adjusted, the gear switch 24 may be pressed togenerate various gear signals. The main control circuit board 23 mayreceive the gear signals and control the rotation speed of the motor tofurther control the rotation speed of the fan blade 21 connected to themotor. Accordingly, a speed of the air driven by the fan assembly 2 toflow into the air duct 11 and a speed of the air flowing out through theair outlets 12 may change. A partition 14 may be arranged inside thebody portion 1. The partition 14 separates an inner space of the bodyportion 1 into a shaped cavity 15 and the air duct 11. The battery 22and the circuit board both are received in the shaped cavity 15. Thebattery 22 may be disposed in a middle of the inner space of the bodyportion 1. In this way, the fan assemblies 2 are arranged at the twoends of body portion 1, whereas the battery 22 is arranged at the middleof the body portion 1, the two ends of the body portion 1 may not be tooheavy, and weights of the two ends of the body portion 1 may bebalanced, preventing a weight center of the body portion 1 from beingshifted towards one side.

As shown in FIG. 2, a cross-sectional area of the air duct 11 graduallydecreases from the two ends to the middle of the body portion 1. The airflowing from the two ends to the middle of the body portion 1 maygenerate a frictional force. At the same time, the cross-sectional areaof the air duct 11 decreases from the two ends to the middle of the bodyportion 1, i.e., the cross-sectional area that the air passes throughwhile flowing in the air duct 11 decreases. In this way, an effect ofthe frictional force on slowing down the speed of the air flow in theair duct 11 may be partially or completely eliminated. The speed of theair flowing out of the air outlets 12 may be controlled within a certainrange, solving a problem of a large difference between the speed of theair flowing out of an air outlet 12 at or near the two ends of the airduct 11 and the speed of the air flowing out of an air outlet 12 in themiddle of the air duct 11.

As shown in FIG. 2, the body portion 1 includes an outer shell 16 and aninner shell 17. Compared to the body portion 1 configured as a one-piecestructure, the body portion 1 of the present embodiment is assembledfrom the outer shell 16 and the inner shell 17, allowing the fanassemblies to be processed and assembled more simply, and allowing latermaintenance to be performed more easily. The partition 14 is arranged onthe inner shell 17 and extends towards the outer shell 16. The air duct11 is defined cooperatively by the inner shell 17, the outer shell 16and the partition 14. When the outer shell 16 is connected to the innershell 17, the partition 14 tightly abuts against an inner side of theouter shell 16, preventing the air in the air duct 11 from entering theshaped cavity 15. The air outlets 12 are defined in the inner shell 17.A portion of the inner shell 17 that contacts the neck of the userextending upwardly to form a curved surface 171. The curved surface 171may be inclined at a certain angle relative to the portion that contactsthe neck of the user, and the air outlets 12 are defined in the curvedsurface 171, such that the air outlets 12 are oriented towards the innerside of the tubular body portion.

As shown in FIGS. 2 and 4, the fan assembly 2 includes a turbine fan 25.The turbine fan 25 defines two inlet windows 251, increasing acirculation area and an efficiency of the turbine fan 25 communicatingwith the external air. A cavity wall of the mounting cavity 13 definestwo air inlets 131 corresponding to the two inlet windows 251 of theturbine fan 25. When the turbine fan 25 is rotating, the external airmay enter the inlet windows 251 through the air inlets 131. A guide post132 is arranged on the cavity wall of the mounting cavity 13 and extendstowards the turbine fan 25. The turbine fan 25 defines a guide hole 253corresponding to the guide post 132. When the turbine fan 25 is receivedin the mounting cavity 13, the guide post 132 extends into the guidehole 253, thereby securing the turbine fan 25 in the mounting cavity 13.

As shown in FIG. 4, the turbine fan 25 defines an air outlet port 252,which is corresponding to and communicating with the air duct 11. An airflow generated by the turbine fan 25 enters the air duct 11 through theair outlet port 252. A portion of a wall of the air outlet port 252 isreceived in the air duct 11. The portion of the wall of the air outletport 252 tightly abuts against a wall of the air duct 11, reducing aloss of the air flow generated by the turbine fan 25 while the air isbeing guided into the air duct 11.

In an embodiment, as shown in FIGS. 5 and 6, FIG. 5 is a schematic viewof a neck fan according to an embodiment of the present disclosure, andFIG. 6 is an explosive view of the neck fan of FIG. 5. The neck fan 30includes an arc-shaped shell 10 and at least four fan assemblies 20. Theat least four fan assemblies 20 may be arranged inside the arc-shapedshell 10. It shall be understood that, for illustration purposes only,in the following embodiment, the neck fan 30 including the at least fourfan assemblies 20 will be taken as an example for illustration.

The arc-shaped shell 10 may be worn to surround the neck of the user.The arc-shaped shell 10 includes a first portion 11 and a second portion12. The first portion 11 and the second portion 12 are arranged aroundtwo sides of the neck, such as a left side and a right side. Each of thefirst portion 11 and the second portion 12 includes an inner wall 101configured to be close to the neck, an outer wall 102 opposite to theinner wall 101, a top wall 103 close to a head of the user andconnecting between the inner wall 101 and the outer wall 102, and abottom wall 104 opposite to the top wall 103 and connecting between theinner wall 101 and the outer wall 102.

The inner wall 101, the outer wall 102, the top wall 103, and the bottomwall 104 cooperatively define a receiving space 105. Each of the firstportion 11 and the second portion 102 defines air inlets 106 and airoutlets 107 communicating with the receiving space 105. In detail, inthe present embodiment, the inner wall 101, the bottom wall 104, and thetop wall 103 may be connected into an integrated structure (such as, aone-piece structure) to serve as a first side wall. The outer wall 102may serve as a second side wall opposite to the first side wall. Thefirst side wall and the second side wall cooperatively define thereceiving space 105.

At least one partition 13 is received inside the receiving space 105 todivide the receiving space 105 into at least two receiving sub-spaces105 a and 150 b. The at least two receiving sub-spaces 105 a and 150 bare arranged successively along an extension direction of the arc-shapedshell 10. Each of the at least two receiving sub-spaces correspond toand communicate with some of the air inlets 106 and some of the airoutlets 107. Each of the fan assemblies is received in one correspondingreceiving sub-space. Each of the fan assemblies is configured to guidethe air, which flows into the corresponding receiving sub-space throughcorresponding air inlets 106, to flow to air outlets 107 correspondingto the receiving sub-space, allowing the air to be blown out through thecorresponding air outlets 107. The number of the air outlets 107 may bemore than one. The more than one air outlets may be distributed alongthe extension direction of the arc-shaped shell 10. Sizes, shapes of theair outlets 107 and/or distances between every two adjacent air outlets107 vary gradually along the extension direction of the arc-shaped shell10.

Compared to the neck fan in the art, in the neck fan 30 illustrated inthe above-mentioned embodiments, the arc-shaped shell 10 includes thefirst portion 11 and the second portion 12. The first portion 11 and thesecond portion 12 are configured to be around two opposite sides of theneck. Each of the first portion 11 and the second portion 12 defines thereceiving space 105, the air inlets 106, and the air outlets 107. Theair inlets 106 and the air outlets 107 communicate with the receivingspace 105. Each receiving space 105 is divided into at least tworeceiving sub-spaces by the partition 13. Each of the fan assemblies 20is arranged in one of the receiving sub-spaces and configured to guidethe air at the air inlets 106 to flow to the air outlets 107 to be blownout. Since the fan assemblies 20 are received in the receiving space105, foreign matters, such as hair, may not be absorbed into the fanassemblies easily, allowing the neck fan to be used safely andconveniently. In the present embodiment, four receiving sub-spaces 105 aand 105 b are defined along the extension direction of the arc-shapedshell 10, and four fan assemblies 20 may be arranged and received infour receiving sub-spaces respectively. Since a plurality of thereceiving sub-spaces 105 a and 105 b are defined, a length of the airduct in each of the receiving sub-spaces may be relatively short. Whenthe air is flowing in each of the receiving sub-spaces, a concentrationof the air being output may be reduced, the user may be comfortableabout the air output, wind noise may be reduced, and an air volume lossmay be reduced. The applicant of the present disclosure finds that, thelonger the air duct, the longer period of time that the air flows alongthe receiving sub-space, increasing the wind noise and the air volumeloss. By dividing the receiving space 105 into the plurality ofreceiving sub-spaces 105 a and 105 b, the wind noise and the air volumeloss may be reduced significantly. In addition, by determining anextension direction, sizes, shapes of the air outlets 107 and distancesbetween two adjacent air outlets 107, the user may be more comfortableabout the air output from the neck fan 30, the air may be output fromthe neck fan 30 more softly, improving the user's experiences.

Further, each fan assembly 20 includes a driving shaft 21 and a fanblade assembly 22 mounted on the driving shaft 21. The driving shaft 21extends from the inner wall 101 towards the outer wall 102. In this way,a thickness of the arc-shaped shell 10 along a direction from the innerwall 101 to the outer wall 102 may be reduced, such that the user may becomfortable when wearing the neck fan.

Further, the air inlets 106 are defined in the outer wall 102, and theair outlets 107 are defined in the top wall 103. It shall be understoodthat, the air inlets 106 are defined in the outer wall 102, and theouter wall 102 faces outwardly (i.e., opposite to the neck of the user),and therefore, the air may enter the shell easily and smoothly. Inaddition, the air outlets 107 are defined in the top wall 103, and thedriving shaft 21 extends from the inner wall 101 to the outer wall 102.In this way, the fan blade assemblies 20 may direct the air from the airinlets 106 to the air outlets 107 to achieve a high air guidingefficiency. Moreover, the air outlets 107 are defined in the top wall103, such that the air may be output towards a face and the head of theuser, such that the user may be cooled rapidly.

Further, an end of the driving shaft 21 is fixedly arranged on the innerwall 101. It shall be understood that, such arrangement together withthe air inlets 106 defined in the outer wall 102 allows the air inlets106 to be unblocked, achieving a better air inlet effect.

Further, each fan assembly 20 corresponds to a plurality of air inlets106. It shall be understood that, air is guided into the fan assembly 20through the plurality of fan inlets 106, allowing the neck fan to have abetter appearance, preventing foreign matters from entering the fanassembly 20 easily, increasing usage safety.

Further, the number of the air inlets 106 corresponding to each fanassembly 20 may be the same. The air inlets 106 corresponding to eachfan assembly 20 are distributed in a circular shape. It shall beunderstood that, such arrangement allows the neck fan to have a betterappearance, and prevents foreign matters from entering the fan assembly20 easily. A better air inlet effect may be achieved due to sucharrangement and shapes of the fan assemblies 20.

Further, a plurality of air inlets 108 are defined in the inner wall 101corresponding to each fan assembly 20. The fan assembly 20 can guide theair from the air inlets 108 to the air outlets 107. Each of theplurality of air inlets 108 is arc shaped. The plurality of air inlets108 corresponding to each fan assembly 20 are distributed in a circularshape. It shall be understood that, such arrangement allows the neck fanto have a better appearance, and prevents foreign matters from enteringthe fan assembly 20 easily. A better air inlet effect may be achieveddue to such arrangement and shapes of the fan assemblies 20.

Further, the fan blade assembly 22 is a turbine fan blade assembly. Itshall be understood that the turbine fan blade assembly may reduce thewind noise and improves the usage safety.

Further, the neck fan 30 further includes a connecting portion 14connected between the first portion 11 and the second portion 12. Theconnecting portion 14 is configured to join the first portion 11 and thesecond portion 12 into an integrated structure. In the presentembodiment, the connecting portion 14 may be configured as an individualelement. In some embodiments, the connecting portion 14 may beintegrally formed with one of the first portion 11 and the secondportion 12, and then assembled with the other of the first portion 11and the second portion 12. A structure of the connecting portion 14 maybe various, and shall not be limited by the present disclosure.

The first portion 11 further includes an end plate 109 disposed at anend of the first portion 11 away from the connecting portion 14. Thesecond portion 12 further includes an end plate 109 disposed at an endof the second portion 12 away from the connecting portion 14. Each endplate 109 is connected to the top wall 103, the bottom wall 104, theinner wall 101 and the outer wall 102. Sizes of the air inlets 106corresponding to the fan assembly 20 arranged near the connectingportion 14 are less than those of the air inlets 106 corresponding tothe fan assembly 20 arranged near the end plate 109. An outer diameterof the fan assembly 20 arranged near the connecting portion 14 is lessthat that of the fan assembly 20 arranged near the end plate 109. Inother words, an end of the first portion 11 at which the end plate 109is disposed may serve as a free end, and an end of the second portion 12at which the end plate 109 is disposed may serve as another free end. Anend of the first portion 11 near the connecting portion 14 may serve asa connecting end, and an end of the second portion 12 near theconnecting portion 14 may serve as another connecting end. In thepresent embodiment, the sizes of the air inlets 106 corresponding to thefan assembly 20 arranged near the connecting end are less than those ofthe air inlets 106 corresponding to the fan assembly 20 arranged nearthe free end. The outer diameter of the fan assembly 20 arranged nearthe connecting end is less than that of the fan assembly 20 arrangednear the free end. It shall be understood that, by determining varioussizes of the air inlets 106 and various outer diameters of the fan bladeassemblies 20, a size of the arc-shaped shell 10 may be graduallyreduced along a direction from the end plate 109 to the connectingportion 14, such that the shell 10 is more suitable to a curve of theneck, allowing the user to be comfortable. In the present embodiment,the end plate 109 may be arc shaped, providing a better appearance. Theshape of the end plate 109 may further be suitable to shapes of thereceiving sub-spaces 105 a and shapes of the fan assemblies 20 toachieve a better air inlet and outlet effect.

It shall be understood that, for each of the first portion 11 or thesecond portion 12, the inner wall 101, the top wall 103, the bottom wall104, the end plate 109, and the partition 13 may be formed as aone-piece structure. The outer wall 102 may be buckled with the top wall103, the bottom wall 104, and the end plate 109 through a buckle. Theremay be various types of buckles and various means to connect the abovestructure integrally, which will not be limited by the presentdisclosure.

Further, the number of the air outlets 107 may be more than one. Themore than one air outlets 107 are distributed along the extensiondirection of the arc-shaped shell 10 and extends to a position near theconnecting portion 14. Sizes of the more than one air outlets 107gradually decrease along a direction from the end plate 109 to theconnecting portion 14. It shall be understood that, the more than oneair outlets 107 may improve the usage safety. Sizes of the more than oneair outlets 107 gradually decrease along the direction from the endplate 109 to the connecting portion 14, allowing the air to be output ina more concentrated manner, improving air outlet intensity. In addition,sizes of the receiving sub-spaces 105 a and 105 b gradually decreasealong the extension direction of the air duct. Therefore, the air outputfrom the overall neck fan may be more uniform, and the user may feelcomfortable. In detail, the extension direction of the arc-shaped shell10 includes a first extension direction and a second extensiondirection. A direction extending from the first portion 11 to the secondportion 12 may be referred to as a first extension direction D1. Thesizes of the more than one air outlets 107 defined in the first portion11 are gradually reduced along the first extension direction D1. Adirection extending from the second portion 12 to the first portion 11is referred to as a second extension direction D2. The sizes of the morethan one air outlets 107 defined in the second portion 12 are graduallyreduced along the second extension direction D2. Furthermore, each ofthe air outlets 107 is a strip-shaped air outlet. An extension directionof the strip-shaped air outlet may be inclined in a preset anglerelative to the extension direction of the arc-shaped shell 10. Thepreset angle may be 90 degrees. It shall be understood that, by definingthe air outlets 107 in the above extension direction, the air outlet ofthe neck fan 30 may be softer, and the user may be more comfortable,improving the user's experience. In particular, when the preset angle is90 degrees, the air outlet efficiency of the air outlets 107 isimproved. In addition, a cross-sectional area of the air duct of thefirst portion is gradually decreased along a direction from the firstportion to the second portion; and/or a cross-sectional area of the airduct of the second portion is gradually decreased along a direction fromthe second portion to the first portion.

Further, the partition 13 is connected to a surface of the inner wall101 facing the outer wall 102 and extends towards the outer wall 102.The partition 13 includes a partition body 130, a first guiding portion131, and a second guiding portion 132. One end of the partition body 130is connected to an end of the bottom wall 104 near the end plate 109.The other end of the partition body 130 extends towards a middle of thetop wall 103 to be close to a middle of the top wall 103. The firstguiding portion 131 includes a first sub-portion 131 a and a secondsub-portion 131 b. The first sub-portion 131 a surrounds a periphery ofthe fan assembly 20 arranged near the end plate 109. The second portion131 b is connected between the first portion 131 a and the top wall 103.The second guiding portion 132 is connected to the partition body 130and surrounds a periphery of the fan assembly 20 near the connectingportion 14. It shall be understood that, the partition body 130 isconfigured to divide the receiving space 105 into the two receivingsub-spaces 105 a and 105 b. The first guiding portion 131 and the secondguiding portion 132 are configured to match shapes of the fan bladeassemblies 22 so as to guide the air and achieve a better air outleteffect.

Further, an end of the second guiding portion 132 away from thepartition body 130 extends to reach the connecting portion 14. Along adirection from the end plate 109 to the connecting portion 14, adistance between the second guiding portion 132 and the bottom wall 103is gradually reduced until the second guiding portion 132 is tangent tothe bottom wall 103, and then the distance between the second guidingportion 132 and the bottom wall 103 is gradually increased to apredetermined value and remains at the predetermined value. Thepredetermined value may be determined according to actual demands, forexample, in some embodiments, the predetermined value may be a half of adistance between the top wall 103 and the bottom wall 104. Sucharrangement of the second guiding portion 132 allows the air duct toextend to reach the connecting portion 14. In addition, some of the airoutlets 107 are defined near the connecting portion 14. In this way, arange of the air output from the neck fan 30 is larger, improving thecooling effect.

Further, the neck fan 30 further includes an electronic control assembly15. The electronic control assembly 15 includes a battery and a printedcircuit board 151. The second guiding portion 132 and the partition body130 cooperatively define a receiving chamber 133 to receive at leastpart of the electronic control assembly 15. It shall be understood, theelectronic control assembly 15 are received in the receiving chamber133, preventing heat generated by the electronic control assembly 15from entering the receiving sub-spaces 105 a and 150 b, and therefore,the cooling effect may not be affected. In addition, such arrangementallows individual arrangement of heat dissipation and wiring of theelectronic control assembly 15, thereby improving the usage safety.

Further, the electronic control assembly 15 further includes a switchbutton 152 and a data port 153. The outer wall 102 of the second portion12 defines a first opening 102 a corresponding to the switch button 152and a second opening 102 b corresponding to the data port 153. Theswitch button 152 is mounted corresponding to the first opening 102 aand connected to the printed circuit board 151. The data port 153 ismounted corresponding to the second opening 102 b and connected to theprinted circuit board 151. Such arrangement allows the user to operatethe neck fan easily, improving user's experience. Furthermore, it shallbe understood, in addition to the electronic control assembly 15,structures and elements of the first portion 11 and the second portion12 are symmetrically arranged to increase wearing comfort.

Further, the outer wall 102 includes a main plate 1021 and an auxiliaryplate 1022. A shape and a position of the auxiliary plate 1022correspond to those of the partition 13. The auxiliary plate 1021 isconnected between the main plate 1021 and the partition 13. It shall beunderstood that the auxiliary plate 1022 and the partition 13cooperatively define the air duct of the fan assembly 20, so as toachieve a better air guiding effect.

In another embodiment, as shown in FIGS. 7 and 8, FIG. 7 is a schematicview of a neck fan 30 according to an embodiment of the presentdisclosure, and FIG. 8 is an explosive view of the neck fan 30 of FIG.7. The neck fan 30 includes an arc-shaped shell 10 and at least four fanassemblies 20. The at least four fan assemblies 20 are arranged insidethe arc-shaped shell 10. It shall be understood that, in the presentembodiment, a neck fan having four fan assemblies 20 may be taken as anexample for illustration.

The arc-shaped shell 10 may be hung around the neck of the user. Thearc-shaped shell 10 includes a first portion 11 and a second portion 12.The first portion 11 and the second portion 12 are arranged around twosides of the neck, such as a left side and a right side. Each of thefirst portion 11 and the second portion 12 includes a side wall thatdefines a receiving space 105. Each of the first portion 11 and thesecond portion 12 defines air inlets 106 and air outlets 107communicating with the receiving space 105.

At least one partition 13 is received in the receiving space 105 todivide the receiving space 105 into at least two receiving sub-spaces105 a and 150 b. The at least two receiving sub-spaces 105 a and 150 bare arranged successively along an extension direction of the arc-shapedshell 10. Each of the at least two receiving sub-spaces correspond toand communicate with some of the air inlets 106 and some of the airoutlets 107. Each of the fan assemblies 20 is received in onecorresponding receiving sub-space. Each of the fan assemblies isconfigured to guide the air, which flows into the correspondingreceiving sub-space through corresponding air inlets 106, to flow to airoutlets 107 corresponding to the receiving sub-space, allowing the airto be blown out through the corresponding air outlets 107. The number ofthe air outlets 107 may be more than one. The more than one air outlets107 may be distributed along the extension direction of the arc-shapedshell 10. Sizes, shapes of the air outlets 107 and/or distances betweenevery two adjacent air outlets 107 vary gradually along the extensiondirection of the arc-shaped shell 10.

Compared to the neck fan in the art, in the neck fan 30 illustrated inthe above-mentioned embodiments, the arc-shaped shell 10 includes thefirst portion 11 and the second portion 12. The first portion 11 and thesecond portion 12 are configured to be around two opposite sides of theneck. Each of the first portion 11 and the second portion 12 defines thereceiving space 105, the air inlets 106, and the air outlets 107. Theair inlets 106 and the air outlets 107 communicate with the receivingspace 105. Each receiving space 105 is divided into at least tworeceiving sub-spaces 105 a and 105 b by the partition 13. Each of thefan assemblies 20 is arranged in one of the receiving sub-spaces andconfigured to guide the air at the air inlets 106 to flow to the airoutlets 107 to be blown out. Since the fan assemblies 20 are received inthe receiving space 105, foreign matters, such as hair, may not beabsorbed into the fan assemblies easily, allowing the neck fan to beused safely and conveniently. In the present embodiment, four receivingsub-spaces 105 a and 105 b are defined along the extension direction ofthe arc-shaped shell 10, and four fan assemblies 20 may be arranged andreceived in four receiving sub-spaces respectively. Since a plurality ofthe receiving sub-spaces 105 a and 105 b are defined, a length of theair duct in each of the receiving sub-spaces may be relatively short.When the air is flowing in each of the receiving sub-spaces, aconcentration of the air being output may be reduced, the user may becomfortable about the air output, wind noise may be reduced, and an airvolume loss may be reduced. The applicant of the present disclosurefinds that, the longer the air duct, the longer period of time that theair flows along the receiving sub-space, increasing the wind noise andthe air volume loss. By dividing the receiving space 105 into theplurality of receiving sub-spaces 105 a and 105 b, the wind noise andthe air volume loss may be reduced significantly.

In detail, the side wall includes a first side wall 101′ configured tobe close to the neck of the user and a second side wall 102 opposite tothe first side wall 101′. The air inlets 106 are defined in the secondside wall 102, and the air outlets 107 are defined in a region of thefirst side wall 101′ adjacent to the second side wall 102 or defined ina region of the second side wall 102 adjacent to the first side wall101′. In the present embodiment, the air outlets 107 are defined in theregion of the first side wall 101′ adjacent to the second side wall 102and are close to the user's head and face.

Further, in detail, a direction extending from the first portion 11 tothe second portion 12 may be referred to as a first extension directionD1. The sizes of the more than one air outlets 107 defined in the firstportion 11 are gradually reduced along the first extension direction D1.A direction extending from the second portion 12 to the first portion 11is referred to as a second extension direction D2. The sizes of the morethan one air outlets 107 defined in the second portion 12 are graduallyreduced along the second extension direction D2. Furthermore, each ofthe air outlets 107 is a strip-shaped air outlet. An extension directionof the strip-shaped air inlet may be inclined in a preset angle relativeto the extension direction of the arc-shaped shell 10. The preset anglemay be 90 degrees. It shall be understood that, by defining the airoutlets 107 in the above extension direction, the air outlet of the neckfan 30 may be softer, and the user may be more comfortable, improvingthe user's experience. In particular, when the preset angle is 90degrees, the air outlet efficiency of the air outlets 107 is improved.In some embodiments, the air outlets 107 may be at least one ofpetal-shaped and heart-shaped. It shall be understood that, both thepetal-shaped air outlets 107 and the heart-shaped air outlets 107 mayoutput the air uniformly and provides better appearance for the neckfan.

Further, each fan assembly 20 includes a driving shaft 21 and a fanblade assembly 22 mounted on the driving shaft 21. The driving shaft 21extends from the first side wall 101′ towards the second side wall 102.In this way, a thickness of the arc-shaped shell 10 along a directionfrom the first side wall 101′ to the second side wall 102 may bereduced, such that the user may be comfortable when wearing the neckfan.

It shall be understood, the air inlets 106 are defined in the secondside wall 102, and the second side wall 102 faces outwardly (i.e., awayfrom the user's neck) allowing the air to flow into the air inlets 106easily, allowing the air to flow in smoothly. Such arrangement togetherwith the driving shaft 21 extending along the direction from the firstside wall 101′ to the second side wall 102 enables the fan bladeassembly 22 to direct the air from the air inlets 106 to the air outlets107, thereby achieving a relatively high air guiding efficiency.Moreover, the air outlets 107 are defined at the first side wall 101′close to the user's head and face, such that the air may be directed outtowards the user's head and face, thereby achieving better coolingeffect.

The first side wall 101′ defines a plurality of air inlets 108corresponding to each fan assembly 20. The fan assembly 20 can guide theair at the air inlets 108 to the air outlets 107. Each of the pluralityof air inlets 108 is arc shaped. The plurality of air inlets 108corresponding to each fan assembly are arranged in a circular shape. Itshall be understood, such arrangement provides a better appearance ofthe neck fan 30, and prevents the foreign matters from entering the fanassembly 20. Such arrangement together with shapes of the fan assemblies20 achieves a better air guiding effect.

In an embodiment, the first side wall defines the plurality of airinlets 108, and the second side wall defines the plurality of air inlets106. The first side wall faces the neck of the user, and the second sidewall is connected to the first side wall and faces away from the neck.Further, at least one of a region of the first side wall close to thesecond side wall and a region of the second side wall close to the firstside wall defines the plurality of air outlets 107. In addition, theplurality of air outlets 107 are located between the plurality of airinlets 108 of the first side wall and the plurality of air inlets 106 ofthe second side wall along an extension direction of the driving shaft21.

Further, the first portion 11 has a connecting end 10 a connected to thesecond portion 12 and a free end 10 b away from the connecting end 10 a;and the second portion 12 also has a connecting end 10 a connected tothe first portion 11 and a free end 10 b away from the connecting end 10a. Sizes of the air outlets 107 corresponding to the fan assembly 20adjacent to the connecting end 10 a are less than those of the airoutlets 107 corresponding to the fan assembly 20 adjacent to the freeend 10 b. An outer diameter of the fan blade assembly 22 adjacent to theconnecting end 10 a is less than that of the fan blade assembly 22adjacent to the free end 10 b. It shall be understood, the sizes of theair inlets 106 and the diameter of the fan blade assembly 22 enables asize of the arc-shaped shell 10 to be reduced gradually along adirection from the free end 10 b to the connecting end 10 a, such thatthe shape of the neck fan may fit a curve of the neck moreappropriately, increasing wearing comfort.

In the present embodiment, each of the first portion 11 and the secondportion 12 includes a cover 16. The cover 16 is disposed on a side ofthe second side wall 102 away from the first side wall 101′ andcorresponds to (such as covers) the air inlets 106. A gap 161communicated with the air inlets 106 is defined between an edge of thecover 16 and the second side wall 102 to allow air to flow into the airinlets 106.

Further, the second side wall 102 includes a main body 102 c and definesa recess 102 d. A wall of the recess 102 d is connected to the main body102 c. In other words, the side of the second side wall 102 away fromthe first side wall 101′ is recessed inwardly towards the first sidewall 101′ to define the recess 102 d. The air inlets 106 are defined atthe recess 102 d, such as defined in the bottom wall of the recess 102d. The cover 16 covers the recess 102 d. The cover 16 is partiallyconnected to the main body 102 c connected to wall of the recess 102 dto define the gap 161. It shall be understood, the cover 16 covers theair inlets 106, and air enters through the gap 161 and the air inlets106. In this way, a better appearance is provided, and the foreignmatters may be prevented from entering the fan assembly 20, increasingthe usage safety. Defining the recess 102 d further reduces an overallsize of the neck fan 30 and provides the appearance aesthetics.

Further, the cover 16 includes a cover body 162 and a first mountingportion 163 arranged at a side of the cover body 162 adjacent to thesecond side wall 102. A side of the second side wall 102 close to thecover 16 is arranged with a second mounting portion 102 e. In detail,the second mounting portion 102 e may be arranged on the wall of therecess 102 d and is located between the plurality of air inlets 106.

Further, the cover 16 further includes the cover body 162 and the firstmounting portion 163 arranged on the cover body 162. The second mountingportion 102 e is arranged on the second side wall 102 and is engagedwith the first mounting portion 163. Engagement between the secondmounting portion 102 e and the first mounting portion 163 enables thecover 16 to be mounted (such as detachably or movably mounted) on theside of the second side wall 102 away from the first side wall 101′. Itshall be understood, engagement between the first mounting portion 163and the second mounting portion 102 e enables the cover 16 to bedetachably or movably mounted onto the second side wall 102, allowingthe neck fan to be used or disassembled easily.

Further, the first mounting portion 163 and the second mounting portion102 e may be engaged in a first mounting state or in a second mountingstate. In the first mounting state, the gap 161 is defined between theedge of the cover 16 and the second side wall 102. In the secondmounting state, the edge of the cover 16 abuts against the second sidewall 102 so as to cover the air inlets 106. It shall be understood, thefirst mounting portion 163 and the second mounting portion 102 e may beengaged in the first mounting state or in the second mounting state.Therefore, in the first mounting state, the air can enter the fanassembly through the gap 161 and the air inlets 106; and in the secondmounting state, the gap 161 and the air inlets 106 are covered, and dustmay be prevented from entering the arc-shaped shell through the airinlets 106 when the neck fan 30 is not in use, achieving the dustproofeffect.

It shall be understood, the first mounting state and the second mountingstate may be switched from one to the other. In some embodiments,elastic fasteners may be configured, serving as the first mountingportion and the second mounting portion. In this way, the first mountingstate and the second mounting state may be switched by pressing thecover 16 along a direction facing the second side wall 102. For example,a first press is made to switch from the first mounting state to thesecond mounting state, and a next press is made to switch from thesecond mounting state to the first mounting state. There are variousstructures for implementing the above-mentioned press switch control,which will not be described specifically hereinafter.

In the present embodiment, the first mounting portion 163 may be amounting shaft connected to the cover body 162, and the second mountingportion 102 e may be a mounting hole corresponding to the mountingshaft. In other embodiments, the first mounting portion 163 may be amounting hole defined in the cover body 162, and the second mountingportion 102 e may be a mounting shaft corresponding to the mountinghole. It shall be understood, the mounting shaft may be received in themounting hole to engage the cover 16 to the second side wall 102,achieving an easy mounting operation.

In the present embodiment, the partition 13 includes a partition body131 and a guiding portion 132. A shape of the partition body 131 atleast partially fits to a shape of the fan assembly 20, and thepartition body 131 surrounds a periphery of the fan assembly 20. Theguiding portion 132 is connected to the partition body 131. The guidingportion 132 and the side wall cooperatively define the air ductcommunicated to the air outlets 107. It shall be understood that byadapting the partition part 131 to the shape of the fan assembly 20 andby configuring the guiding portion 132 and the side wall tocooperatively define the air duct 17 communicated to the air outlets107, a better air guiding effect may be achieved, and an air inlet andoutlet efficiency may be improved.

Further, for each of the first portion 11 and the second portion 12, theguiding portion 132 includes a first guiding sub-portion 132 a locatedbetween two fan assemblies 20 and a second guiding sub-portion 132 barranged at a side of one of the two fan assemblies 20 away from theother of the two fan assemblies. The second guiding sub-part 132 bextends from one of the first portion 11 and the second portion 12 tothe other of the first portion 11 and the second portion 12. A side ofthe second guiding sub-portion 132 b and the side wall cooperativelydefine an accommodating space 18. The neck fan 30 further includes anelectronic control assembly 15. The electronic control assembly 15includes a battery and a printed circuit board. The accommodating space18 is defined to receive at least one of the battery and the printedcircuit board. It shall be understood, by receiving the electroniccontrol assembly 15 in the accommodating space 18, configuration of theneck fan 30 may be effectively balanced, providing wearing comfort forthe user. In addition, the fan blade assembly 20 may be a turbine fanblade assembly. It shall be understood that the turbine fan bladeassembly may achieve lower noise and higher safety.

In an embodiment, as shown in FIG. 4, the present disclosure provides aturbine blade assembly 22 for a neck fan. The turbine blade assembly 22has a first side and a second side opposite to the first side. Theturbine blade assembly 22 includes a first side blade disposed at thefirst side, a second side blade disposed at the second side, and aseparation plate disposed between the first side and the second side.The first side defines a first inlet window, and the second side definesa second inlet window. The first inlet window and the second inletwindow are defined to allow air to flow in from an outside of the neckfan. A bottom wall of the first inlet window is recessed from a planewhere the first side blade is disposed. A bottom wall of the secondinlet window is recessed from a plane where the second side blade isdisposed.

As shown in FIGS. 10-11, FIG. 10 is a perspective view of a neck fanaccording to another embodiment of the present disclosure, and FIG. 11is a perspective view of the neck fan shown in FIG. 10 from another viewangle. The neck fan 1 includes a curved shell 10 and a fan assembly 20.The neck fan 1 can be worn around the neck.

As shown in FIGS. 12-14, FIG. 12 is an exploded view of the neck fanshown in FIG. 10, FIG. 13 is a perspective view of a portion of the neckfan shown in FIG. 10, and FIG. 14 is a cross sectional view of the neckfan shown in FIG. 10. The shell 10 includes a first shell 11 and asecond shell 12. The first shell 11 and the second shell 12 are oppositeto each other, and are disposed on opposite sides of the neck when theneck fan 1 is worn on the user. At least one of the first shell 11 andthe second shell 12 includes a first part 111, a second part 112 and athird part 113. The third part 113 is connected between the first part111 the second part 111. The first part 111 defines a first storagecavity 111 a and a first air outlet 111 b communicating with the firststorage cavity 111 a. The second part 112 defines a second storagecavity 112 a and a second air outlet 112 b communicating with the secondstorage cavity 112 a. The third part 113 defines a third storage cavity113 a between the first storage cavity 111 a and the second storagecavity 112 a, and the third storage cavity 113 a is communicating withthe first storage cavity 111 a and the second storage cavity 112 a. Atleast one of the first shell 11 and the second shell 12 defines an airinlet 114 communicating with at least one of the first storage cavity111 a, the second storage cavity 112 a and the third storage cavity 113a. The fan assembly 20 is at least partially received in the thirdstorage cavity 113 a and is configured to guide the air from the airinlet 114 to the first air outlet 111 b and the second air outlet 112 b.

As shown in FIG. 9, FIG. 10, FIG. 11 and FIG. 12, the neck fan includesa shell 1, an adjustment assembly 2 and a fan assembly 3. The shell 1 isconfigured to hang around the user's neck. The shell 1 defines an airinlet C1, an air outlet C2 and an air duct C3, and the air inlet C1, theair outlet C2 and the air duct C3 communicate with each other. Theadjustment assembly 2 is arranged on the shell 1 to adjust a bendingangle of the shell 1. The fan assembly 3 is received inside the shell 1and is configured to guide the air entering from the air inlet C1 toflow along the air duct C3 to reach the air outlet C2, such that the airfurther flows to an outside of the neck fan through the air outlet C2.The adjustment assembly 2 is configured to adjust the bending angle ofthe shell 1, such that the shell 1 can matched with various neck sizesof various users. In this way, the neck fan can be portable and highlyadaptable, allowing various users to have better usage experience.

In an embodiment, the shell includes a first shell, a second shell and athird shell. The third shell is connected between the first shell andthe second shell. Each of two opposite ends of the third shell isconfigured with one adjustment assembly. An end of the third shell isconnected to the first shell through a corresponding adjustmentassembly, and the other end of the third shell is connected to thesecond shell through another corresponding adjustment assembly. Each ofthe first shell and the second shell is rotatable relative to the thirdshell through shell adjustment assembly.

In an embodiment, each of the first shell and the second shell may serveas an air guide portion 11. The third shell may serve as a neck wearingportion 12. That is, in the present embodiment, the shell 1 includes theair guide portion 11 and the neck wearing portion 12. The air guideportion 11 is disposed at each of two free ends of the neck wearingportion 12. The air guide portion 11 is connected to the neck wearingportion 12 through the adjustment assembly 2. The adjustment assembly 2may be configured with the air guide portion 11 to connect to the neckwearing portion 12. Alternatively, the adjustment assembly 2 may beconfigured with the neck wearing portion 12 to connect to the air guideportion 11. The air duct C3 extends from the fan assembly 3 towards theneck wearing portion 12.

In another embodiment, the adjustment assembly 2 includes a positionlimitation member 21 and a shaft structure 22. The shaft structure 22can rotate and hover by itself. The shaft structure 22 includes a firstshaft portion 221 and a second shaft portion 222. The first shaftportion 221 and the second shaft portion 222 can rotate relative to eachother. The position limitation member 21 is disposed at an end portionof the neck wearing portion 12. The position limitation member 21 isconnected to the first shaft portion 221. The second shaft portion 222is connected to the air guide portion 11. The shaft structure 22 and theposition limitation member 21 are configured to enable the shaftstructure 22 to connect to both the air guide portion 11 and the neckwearing portion 12. In this way, so that the air guide portion 11 andthe neck wearing portion 12 can rotate relative to each other. While theuser is wearing the fan, the air guide portion 11 and the neck wearingportion 12 may be rotated to reach a position suitable for the wearer'sneck. The shaft structure 22 can hover by its own, and therefore,rotation can be stopped when the suitable position is reached,preventing the shaft structure 22 from further rotating while the useris wearing the fan. In this way, while the user is wearing the fan, thefan can stably attach to the user's neck.

It shall be understood that, while the user is wearing the fan, anopening angle of the neck fan is selectable. The opening angle can beadjusted to blow the air to various regions of the head. In this way,the shaft structure allows the user to rotate the shells to blow the airto desired places on purpose.

In another embodiment, the shaft structure 22 is received inside theneck wearing portion 12, and an outer periphery of the shaft structure22 is not provided with any damping element. In this way, the shaftstructure 22 can be well protected from erosion caused by external wateror dust. It shall be understood that the shaft structure 22 is receivedinside the neck wearing portion 12. Compared to the shaft structure 22,the end portion of the neck wearing portion 12 is closer to the airguide portion 11. The shaft structure 22 is located at a position havinga certain distance from the end portion of the neck wearing portion 12.The neck wearing portion 12 includes an upper shell and a lower shell.The shaft structure 22 is arranged on the lower shell of the neckwearing portion 12, and specifically, the shaft structure 22 is disposedon a side near the upper shell. The end portion of the neck wearingportion 12 wraps around the shaft structure 22. In this way, the shaftstructure 22 is wrapped and hidden, enhancing aesthetic appearance andintegrity of the neck fan, and allowing an internal space of the necksection 12 to used optimally.

The damping element may include an elastic pad, a silicone pad, a metalpad, and so on. Generally, the pad may be worn out and become smoothafter being used for a long time, resulting in a lower friction, whichin turn affects the hovering effect.

In another embodiment, as shown in FIG. 13, the position limitationmember 21 defines a first recess 211 for receiving the first shaftportion 221. An end of the air guide portion 11 near the neck wearingportion 12 defines a second recess 122 for receiving the second shaftportion 222. A size of the first shaft portion 221 is larger than a sizeof the first recess 211. A size of the second shaft portion 222 islarger than a size of the second recess. The “size” may refer to adiameter in the present embodiment. In this way, an interference fit isachieved between the shaft structure 22 and the first recess 211, andbetween the shaft structure 22 and the second recess 122. In addition,such configuration may extend a service life of the shaft structure.After the shaft structure 22 is rotated for a large number of times andis used for a long time, the shaft structure 22 may not be worn out, arelatively high friction may be maintained, ensuring the hoveringeffect, and a slipping phenomenon may be avoided.

The above-mentioned configuration allows the shaft structure 22 to bewrapped by a wall of the first recess 211 and a wall of the secondrecess 122. On one hand, rotation of the shaft structure 22 may not beaffected, and on the other hand, the shaft structure may be wellprotected, extending the service life of the shaft structure 22.

In another embodiment, a surface of the shaft structure has knurling. Indetail, an outer surface of the shaft structure is arranged with theknurling. The knurling allows the shaft structure 22 to be in theinterference fit with the first recess 211 and the second recess. Acontact area between the shaft structure and the wall of the firstrecess 211 and a contact area between the shaft structure and the wallof the second recess are increased, ensuring the frictional force to besufficient for the hovering effect, and the service life of the neckfan, which can adjust the bending angle, may be increased.

In another embodiment, the position limitation member 21 defines a wireslot 212 for receiving and collecting wires. The wire slot 212 allowsthe wires to be gathered well, preventing the wires from occupying toomuch space of the neck fan, facilitating subsequent maintenance of theneck fan, and facilitating replacement of components of the neck fan.

In another embodiment, the position limitation member 21 is anindependent structure. Alternatively, the position limitation member 21may be integrally formed with the air guide portion 11. Alternatively,the position limitation member 21 may be integrally formed with the neckwearing portion 12.

In another embodiment, one of the air guide portion 11 and neck wearingportion 12 is configured with a plurality curved bumps, and the otherone of the air guide portion 11 and neck wearing portion 12 defines aplurality of curved grooves. The curved bumps may be adapted to andengaged with the curved grooves. The bending angle of the shell 1 may beadjusted by engaging the curved bumps with the curved grooves at variouspositions. In this way, the neck fan may be adapted to various necksizes of various users.

In another embodiment, the adjustment assembly 2 includes a plurality ofprotrusions and a plurality of recesses. The plurality of protrusionsare arranged on one of the air guide portion 11 and the neck wearingportion 12, and the plurality of recesses are defined in the other oneof the air guide portion 11 and the neck wearing portion 12. The bendingangle of the shell 1 may be adjusted by engaging the protrusions withthe recesses at various positions. In this way, the neck fan may beadapted to various neck sizes of various users.

In another embodiment, the adjustment assembly 2 includes a slide blockand a slide rail. The slide block is arranged one of the air guideportion 11 and the neck wearing portion 12, and the slide rail isarranged on the other one of the air guide portion 11 and the neckwearing portion 12. The slide block is slidable on the slide rail. Thebending angle of the shell 1 may be adjusted by sliding the slide blockto reach various positions on the slide rail. In this way, the neck fanmay be adapted to various neck sizes of various users.

In another embodiment, an inner side (a side near the user's neck) ofthe neck wearing portion 12 is arranged with an attachment portion 13.The attachment portion 13 is configured to attach to the user's neck,allowing the user to feel more comfortable while wearing the fan. Theattachment portion 13 may be curved inwardly. The attachment portion 13may be made of soft material, allowing the attachment portion to attachto the user's neck more easily, protecting the user's skin from beingrubbed.

In another embodiment, the fan assembly 3 includes a fan 31 and a motordriving the fan to rotate.

As shown in FIG. 14 and FIG. 15, the position limitation member 21 thefirst recess 211 for receiving the first shaft portion 221. An insertionportion is extended from the end of the air guide portion 11. Theinsertion portion 111 defines the second recess 122 for receiving thesecond shaft portion 222. The end of the neck wearing portion 12 definesa receiving recess 121 for receiving the insertion portion 111 of theend of the air guide portion 11. In this way, the air guide portion 11and the neck wearing portion 12 are connected. In addition, stability ofthe connection between the air guide portion 11 and the neck wearingportion 12 may be improved.

The insertion portion 111 may be rod shaped, and an end of the insertionportion 111 may be cylindrical. An end surface of the end of theinsertion portion 111 may be recessed along a central axis of thecylindrical end to define the second recess 122.

In another embodiment, an edge of the air guide portion near theinsertion portion 111 may be a recessed-curved portion H1. An edge of awall of the receiving recess 121 near the neck wearing portion 12 may bea protruded-curved portion H2. The recessed-curved portion H1 may fitwith the protruded-curved portion H2. In this way, while the insertionportion 111 is inserted into the receiving recess 121, an edge of theair guide portion 11 and an edge of the neck wearing portion 12 may beconnected tightly, preventing the external water and dust from an insideof the neck fan through a gap between the air guide portion 11 and theneck wearing portion 12, such that the neck fan may be protected fromerosion.

In another embodiment, when the insertion portion 111 is inserted intothe receiving recess 121, a rotation gap X1 may be defined between theinsertion portion 111 and the wall of the receiving recess 121. When theuser is adjusting relative positions between the air guide portion 11and the neck wearing portion 12, i.e., when the shaft structure 22 isrotating, the insertion portion 11 may be rotating in the receivingrecess 121. Defining the rotation gap X1 provides a space margin forrotating the insertion portion 111 in the receiving recess 121,facilitating the user to adjust the neck fan based on the size of theuser's neck.

According to the present disclosure, the neck fan includes the shell,the adjustment assembly and the fan assembly. The shell is configured tohang around the user's neck. The shell defines the air inlet, the airoutlet, and the air duct, and the air inlet, the air outlet, and the airduct communicate with each other. The adjustment assembly is arranged onthe shell and is configured to adjust the bending angle of the shell.The fan assembly is received inside the shell and is configured to guidethe air from the air inlet to flow through the air duct to reach the airoutlet, such that the air further flows to the outside through the airoutlet. The neck fan is portable, and the bending angle of the neck fanis adjustable, such that the neck fan may be suitable for various necksizes of various users.

FIGS. 16-22 show a neck fan according to another embodiment of thepresent disclosure.

FIG. 17 is a schematic view of a neck fan according to an embodiment ofthe present disclosure. FIG. 18 is a schematic view of the neck fanshown in FIG. 17 from another view angle. The neck fan 1 includes anarc-shaped shell 10 and a fan assembly 20. The neck fan may be wornaround the user's neck to free the user's hands.

FIG. 19 is an enlarged view of the neck fan shown in FIG. 17, FIG. 20 isa schematic view of a portion of the neck fan shown in FIG. 17, and FIG.21 a cross section view of the neck fan shown in FIG. 17. The shell 10includes a first shell and a second shell 12 opposite to the first shell11. The first shell 11 and the second shell 12 may be configured at twoopposite sides of the user's neck. At least one of the first shell 11and the second shell 12 includes a first portion 111, a second portion112 and a third portion 113. The third portion 113 is connected betweenthe first portion 111 and the second portion 112. The first portion 111defines a first receiving cavity 111 a and a first air outlet 111 bcommunicating with the first receiving cavity 111 a. The second portion112 defines a second receiving cavity 112 a and a second air outlet 112b communicating with the second receiving cavity 112 a. The thirdportion 113 defines a third receiving cavity 113 a. The third receivingcavity 113 a is between the first receiving cavity 111 a and the secondreceiving cavity 112 a, and is communicating with the first receivingcavity 111 a and the second receiving cavity 112 a. At least one of thefirst shell 11 and the second shell 12 defines an air inlet 114,communicating with at least one of the first receiving cavity 111 a, thesecond receiving cavity 112 a, and the third receiving cavity 113 a. Atleast a portion of the fan assembly 20 is received in the thirdreceiving cavity 113 a, and is configured to guide the air from the airinlet 114 to the first air outlet 111 b and the second air outlet 112 b.

In the present embodiment, at least a portion of the fan assembly 20 isreceived in the third receiving cavity 113 a, and the air is guided fromthe air inlet 114 to both the first air outlet 111 b and the second airoutlet 112 b. Since the air flows to the outside of the fan through thefirst air outlet 111 b and the second air outlet 112 b, the amount offlowing air at the air outlets may be increased, and an air flowingefficiency may be increased, such that the user may be cooled rapidly.In addition, at least a portion of the fan assembly 20 is received inthe third receiving cavity 113 a, and wind generated from the fanassembly 20 is guided to both the first air outlet 111 b and the secondair outlet 112 b. In this way, the wind generated from the fan assembly20 may be utilized optimally, and a reduced wind efficiency caused by alarge amount of wind flowing to an end of the shell may be avoided. Inthis way, noise of the neck fan may be reduced, and a loss in the amountof wind may be reduced, such that the air flowing efficiency may beincreased. Further, the user's hair and other foreign matters may not becaught into the fan assembly 20 easily, such that the neck fan may beused safely and conveniently. Further, the fan assembly 20 is disposedbetween the first air outlet 111 b and the second air outlet 112 b. Inthis way, a reduced cooling effect of a neck fan in the art, which iscaused by a free end of the neck fan being a wind-free zone E, may besolved. In the present embodiment, an end of the first portion 111 awayfrom the third portion 113 defines the first air outlet 111 b, enablingthe air/wind to flow out of the fan through the first air outlet 111 bto cover the user's face. Therefore, the user's mouth, nose, and so onmay be cooled.

In some embodiments, the third portion 113 includes a wind-free regionN. The wind-free region N locates between the first air outlet 111 b andthe second air outlet 112 b and locates at a position corresponding tothe fan assembly 20. The wind-free region N may not define any airoutlet or define a blind-hole (such as a recess) that does not allow anyair to flow out. Since the wind-free region N corresponds to the fanassembly 20, the wind generated by the fan assembly 20 may bedistributed to the first air outlet 111 b and the second air outlet 112b, which are defined at two sides of the fan assembly 20. In this way,the air flowing efficiency is increased, and the wind may be flowinggently. In addition, the wind-free region N prevents the wind fromblowing towards the user's face directly. The wind-free region Nseparates the first air outlet 111 b and the second air outlet 112 b,such that the wind may be scattered to two sides, preventing anexcessively large amount of wind from flowing towards the user's facehardly (which may be caused by the wind flowing through a single airoutlet), such that facial paralysis may be avoided. Further, in thepresent embodiment, a position where the wind-free region N is arrangedcorresponds to the user's ear, such that the wind may not flow towardsthe user's ear directly, reducing wind noise and protecting the user'shearing.

Further, in the present embodiment, each of the first shell 11 and thesecond shell 12 includes the first portion 111, the second portion 112,and the third portion 113. Two fan assemblies 20 may be arranged. One ofthe two fan assemblies 20 may be received in the third receiving cavity113 a of the first shell 11 and may be configured to guide the air fromthe air inlet 114 of the first shell 11 to flow to the first air out let111 b and the second air outlet 112 b of the first shell 11. The otherone of the two fan assemblies 20 may be received in the third receivingcavity 113 a of the second shell 12, and may be configured to guide theair from the air inlet 114 of the second shell 12 to flow to the firstair out let 111 b and the second air outlet 112 b of the second shell12. It shall be understood that the first shell 11 and the second shell12, which may be arranged at two opposite sides of the user's neck, maybe structurally symmetric with each other. That is, each of the firstshell 11 and the second shell 12 is arranged with the first portion 111,the second portion 112, and the third portion 113. One fan assembly 20is received in each of the third portion 113 of the first shell 11 andthe third portion 113 of the second shell 12. While the neck fan 1 isworking, the two fan assemblies 20, which are arranged at two oppositesides of the user's neck, may guide the air from the air inlet 114 ofthe first shell 11 to flow to the first air out let 111 b and the secondair outlet 112 b of the first shell 11 and guide the air from the airinlet 114 of the second shell 12 to flow to the first air out let 111 band the second air outlet 112 b of the second shell 12. Since each ofthe first shell 11 and the second shell 12 includes the first portion111, the second portion 112, and the third portion 113, and the fanassembly 20 is received in each of the third portion 113 of the firstshell 11 and the third portion 113 of the second shell 12, air flowingfrom the air inlet 114 of the first shell 11 to the first air out let111 b and the second air outlet 112 b of the first shell 11 and airflowing from the air inlet 114 of the second shell 12 to the first airout let 111 b and the second air outlet 112 b of the second shell 12 mayoccur simultaneously. In this way, the amount of air flowing to theinside of the neck fan and the amount of air flowing out of the neck fanmay be increased, such that the user may be cooled rapidly. Further, thewind may be blown to two sides of the user's neck, improving the user'sexperience.

In more detail, the fan assembly 20 includes a turbine fan 21. Theturbine fan 21 includes a fan shaft 211 and a plurality of turbineblades 212 surrounding the fan shaft 211. An air flowing direction ofthe turbine fan 21 is perpendicular to an extending direction of the fanshaft 211. In this way, a large amount of wind may be generated byoccupying a relatively small space, such that the air flowing efficiencyof the neck fan 1 may be increased. By configuring the turbine fan 21for the fan assembly 20, noise generated while the neck fan is being inuse may be reduced effectively, and at the same time, the air flowingefficiency of the neck fan 1 may be increased.

In detail, the plurality of turbine blades 212 may include a first endface 212 a and a second end face 212 b, and the first end face 212 a andthe second end face 212 b are disposed along the extending direction ofthe fan shaft 211. A distance from the first end face 212 a to the shell10 may be in a range of 1 mm to 6 mm, and/or a distance from the secondend face 212 b to the shell 10 may be in a range of 1 mm to 6 mm. Adiameter of the turbine fan 21 may be in a range of 35 mm to 45 mm. Athickness of the turbine fan 21 along the extending direction of the fanshaft 211 may be in a range of 10 mm to 25 mm. In some embodiments, thedistance from the first end face 212 a to the shell 10 may be 1 mm,and/or the distance from the second end face 212 b to the shell 10 maybe 1 mm. The air flowing efficiency of the fan assembly 20 may beincreased by setting three parameters for the neck fan. The threeparameters may include: the distance from the first end face 212 a tothe shell 10 being in a range of 1 mm to 6 mm and/or the distance fromthe second end face 212 b to the shell 10 being in a range of 1 mm to 6mm; the diameter of the turbine fan 21 being in a range of 35 mm to 45mm; and the thickness of the turbine fan 21 along the extendingdirection of the fan shaft 211 being in a range of 10 mm to 25 mm. Insome embodiments, the distance from the first end face 212 a to theshell 10 may be 1 mm, and/or the distance from the second end face 212 bto the shell 10 may be 1 mm, and in this way, the air flowing efficiencyof the neck fan 1 may be increased.

Further, each of the first portion 111, the second portion 112, and thethird portion 113 may include a first inner plate 115, a first outerplate 116, a first connection plate 117, and a second connection plate118. The first inner plate 115 may be disposed near the user's neck. Thefirst outer plate 116 may be opposite to the first inner plate 115. Thefirst connection plate 117 may be connected between the first innerplate 115 and the first outer plate 116, and may be disposed near theuser's head. The second connection plate 118 may be opposite to thefirst connection plate 117. The first portion 111 may further include afirst end plate 119 disposed between the first inner plate 115, thefirst outer plate 116, the first connection plate 117, and the secondconnection plate 118. The air inlet 114 may be defined in at least oneof the first inner plate 115 and the first outer plate 116 of the thirdportion 113. The first air outlet 111 b may be defined in the firstinner plate 115 of the first portion 111. The second air outlet 112 b inthe first inner plate 115 of the second portion 112. The first end face212 a may correspond to the first inner plate 115 of the third portion113. The second end face 212 b may correspond to the first outer plate116 of the third portion 113. The fan shaft 211 may extend along adirection from the first inner plate 115 to the fists outer plate 116.In the present embodiment, the air inlet 114 is defined in at least oneof the first inner plate 115 of the third portion 113 and the firstouter plate 116 of the third portion 113, the first air outlet 111 b maybe defined in the first inner plate 115 of the first portion 111, andthe second air outlet 112 b in the first inner plate 115 of the secondportion 112. In this way, the fan assembly 20 is disposed between thefirst air outlet 111 b and the second air outlet 112 b. The fan assembly20 may drive the air/wind to flow from the air inlet 114 to the firstair outlet 111 b and the second air outlet 112 b, which are defined attwo opposite sides of the fan assembly 20. Air flowing through the firstair outlet 111 b does not interfere air flowing through the second airoutlet 112 b. In this way, the loss in the air flowing may be reduced,improving the air flowing efficiency of the neck fan 1.

Further, the air inlet 114 may be defined each of the first inner plate115 and the first outer plate 116 of the third portion 113. In this way,wind stifling caused by only one of the first inner plate 115 and thefirst outer plate 116 defining the air inlet 114 may be avoided,allowing the air to fluently flow through any air duct between any airinlet and any air outlet, such that the wind may flow more fluently, andwind noise may be reduced. The first inner plate 115 of the thirdportion 113 may include a first body portion 115 b and a first coverplate 115 c. The first body portion 115 b defines a first opening 115 a.The first cover plate 115 c is mounted at the first opening 115 a. Theair inlet 114 may include a plurality of first air inlets 115 d definedin the first cover plate 115 c. Each of the first opening 115 a and thefirst cover plate 115 c may be circular. The plurality of first airinlets 115 d may be evenly distributed in the first cover plate 115 c.The first outer plate 116 of the third portion 113 may include a secondbody portion 116 b and a second cover plate 116 c. The second bodyportion 116 b defines a second opening 116 a. The second cover plate 116c is mounted at the second opening 116 a. The air inlet 114 may includea plurality of second air inlets 116 d defined in the second cover plate116 c. Each of the second opening 116 a and the second cover plate 116 cmay be circular. The plurality of second air inlets 116 d may be evenlydistributed in the second cover plate 116 c. It shall be understoodthat, in the present embodiment, the fan assembly 20 includes theturbine fan 21, air flowing in/out of the turbine fan 21 may be in atoroidal turbine manner. Therefore, the first opening 115 a, the firstcover plate 115 c, the second opening 116 a, and the second cover plate116 c may be configured be circular, such that the openings and thecover plates may be optimally adapted with the air flowing of theturbine fan 21, reducing the loss in the air flowing. Furthermore, theplurality of first air inlets 115 d are evenly distributed in the firstcover plate 115 c, and the plurality of second air inlets 116 d areevenly distributed in the second cover plate 116 c, such that air out ofthe turbine fan 21 may flow more fluently and evenly, and the airflowing efficiency of the neck fan 1 may be improved.

Further, the neck fan 1 may further include a first partition portion121, a second partition portion 122, a first wind guide portion 123, anda second wind guide portion 124. The first partition portion 121 is atleast partially received in the third receiving cavity 113 a and coversa side of the fan assembly 20 near the user's face and the secondportion 112. The second partition portion 122 covers an outer peripheryof the fan assembly 20 and is opposite to the first partition portion121. The first wind guide portion 123 is connected to the secondpartition portion 122 and is received in the first receiving cavity 111a. The second wind guide portion 124 is received in the second receivingcavity 112 a. The first wind guide portion 123 divides the firstreceiving cavity 111 a into a first sub-cavity 111 c and a first airduct 125 communicating with the first air outlet 111 b of the firstportion 111. The second wind guide portion 124 divides the secondreceiving cavity 112 a into a second sub-cavity 112 c and a second airduct 126 communicating with the second air outlet 112 b of the secondportion 112. It shall be understood that the first partition plate 121and the second partition plate 122 are disposed at two opposite sides ofthe fan assembly 20, the wind generated from the fan assembly 20 may beguided by the first partition plate 121 and the second partition plate122 to flow to the first wind guide portion 123 and the second windguide portion 124, and subsequently, the wind may be guided by the firstwind guide portion 123 and the second wind guide portion 124 to flow tothe first air duct 125 and the second air duct 126 to reach the firstair outlet 111 b and the second air outlet 112 b respectively. Byarranging the first partition portion 121, the second partition portion122, the first wind guide portion 123, and the second wind guide portion124, the first receiving cavity 111 a is divided, the first air duct 125is defined to communicate with the first air outlet 111 b of the firstportion 111, the second receiving cavity 112 a is divided, and thesecond air duct 126 is defined to communicate with the second air outlet112 b of the second portion 112. The first air duct 125 and the secondair duct 126 may be defined to guide the wind generated from the fanassembly 20 to the first air outlet 111 b and the second air outlet 112b respectively, reducing the loss in the air flowing, allowing the airto flow to various positions of the user accurately, and increasing theair flowing efficiency.

Further, the neck fan 1 may include a first auxiliary guide plate 127and a second auxiliary guide plate 128. The first auxiliary guide plate127 is configured to divide the first air duct 125 into a first sub-duct125 a and a second sub-duct 125 b. More than one first air outlets 111 bmay be defined, and more than one second air outlets 112 b may bedefined. The first sub-duct 125 a may communicate with a portion of themore than one first air outlets 111 b of the first portion 111, and thesecond sub-duct 125 b may communicate with another portion of the morethan one first air outlets 111 b of the first portion 111. The secondauxiliary guide plate 128 is configured to divide the second air duct126 into a third sub-duct 126 a and a fourth sub-duct 126 b. The thirdsub-duct 126 a may communicate with a portion of the more than onesecond air outlets 112 b of the second portion 112, and the fourthsub-duct 26 b may communicate with another portion of the more than onesecond air outlets 112 b of the second portion 112. By arranging thefirst auxiliary guide plate 127, the first air duct 125 is divided intothe first sub-duct 125 a and the second sub-duct 125 b. By arranging thesecond auxiliary guide plate 128, the second air duct 126 is dividedinto the third sub-duct 126 a and the fourth sub-duct 126 b. In thisway, the wind may be evenly distributed to the first air outlets 111 band the second air outlets 112 b, reducing the loss in the air flowing,allowing the air to flow to various positions of the user accurately,and increasing the air flowing efficiency.

Further, an end portion of the first auxiliary guide plate 127 near theair outlets 111 b and 112 b and an end portion of the second auxiliaryguide plate 128 near the air outlets 111 b and 112 b may besubstantially perpendicular to a wall of the shell defining the airoutlets 111 b and 112 b. In this way, after the wind is guided by thefirst auxiliary guide plate 127 and the second auxiliary guide plate128, the wind may be blown out of the neck fan along a directionsubstantially perpendicular a plane where the first connection plate 117is arranged. In this way, the wind may be blown to the user's facestraightly. In the art, the wind may be blown to the user's facenon-straightly, and the wind from various air outlets may interfere witheach other. Therefore, in the present embodiment, a force of the windmay not be reduced.

Further, the neck fan 1 may further include an electronic controlassembly 30. The electronic control assembly 30 may include at least oneof a battery 31, a circuit board 32, and a control switch 33. At least aportion of the electronic control assembly 30 is received in the firstsub-cavity 111 c or the second sub-cavity 112 c. The electronic controlassembly 30 is configured to supply power for the neck fan 1, allowingthe neck fan 1 to be portably used. In addition, by receiving at least aportion of the electronic control assembly 30 in the first sub-cavity111 c and the second sub-cavity 112 c, the neck fan 1 may be usedsafely.

Further, the shell 10 may further include a connection member 13. Theconnection member 13 may be connected between the first shell 11 and thesecond shell 12. The connection member 13 may be a flexible connectionmember that can be bent manually. By arranging the connection member 13to be connected between the first shell 11 and the second shell 12, andby allowing the flexible connection member 13 to be bent manually andfixed at a certain bending angle, the user may wear the neck fan 1 morecomfortably, since the user may adjust the bending portion of the neckfan based on the size of the user's neck. To be noted that, in someembodiments, the connection member 13 may be omitted. That is, the firstshell 11 may be connected to the second shell 12 directly;alternatively, the first shell 11 and the second shell 12 may beintegrally formed as one piece, the first inner plate 115 and the firstouter plate 116 may be uncoverable, and the neck fan 1 may be assembledand used through the uncoverable first inner plate 115 and theuncoverable first outer plate 116; alternatively, the first inner plate115 of the first shell 11 and the first inner plate 115 of the secondshell 12 may be integrally formed as one piece, and the first outerplate 116 may be uncoverable; alternatively, the first outer plate 116of the first shell 11 and the first outer plate 116 of the second shell12 may be integrally formed as one piece, and the first inner plate 115may be uncoverable.

To be noted that, in the present embodiment, the electronic controlassembly 30 is received in the first sub-cavity 111 c. While using theneck fan 1, the end portion of the first portion 111 may be suspended.Therefore, heat generated by the electronic control assembly 30 may beprevented from transferring to the user, improving the user experience.

As shown in FIG. 22, in the present embodiment, the first partitionplate 121 is at least partially received in the third receiving cavity113 a and covers the side of the fan assembly near the user's face andthe first portion 111. The second partition portion 122 covers the outerperiphery of the fan assembly 20 and is opposite to the first partitionportion 121. The first wind guide portion 123 is received in the firstreceiving cavity 111 a. The second wind guide portion 124 is received inthe second receiving cavity 112 a and is connected to the secondpartition portion 122. The first wind guide portion 123 divides thefirst receiving cavity 111 a into the first sub-cavity 111 c and thefirst air duct 125 communicating to the first air outlet 111 b of thefirst portion. The second wind guide portion 124 divides the secondreceiving cavity 112 a into the second sub-cavity 112 c and the secondair duct 126 communicating to the second air outlet 112 b of the secondportion.

The first auxiliary guide plate 127 is configured to divide the firstair duct 125 into the first sub-duct 125 a and the second sub-duct 125b. The first sub-duct 125 a communicates with a portion of the more thanone air outlets 111 b of the first portion 111. The second sub-duct 125b communicates with another portion of the more than one air outlets 111b of the first portion 111. The second auxiliary guide plate 128 isconfigured to divide the second air duct 126 into the third sub-duct 126a and the fourth sub-duct 126 b. The third sub-duct 126 a communicateswith a portion of the more than one air outlets 112 b of the secondportion 112. The fourth sub-duct 126 b communicates with another portionof the more than one air outlets 112 b of the second portion 112. Byarranging the first auxiliary guide plate 127, the first air duct 125 isdivided into the first sub-duct 125 a and the second sub-duct 125 b. Byarranging the second auxiliary guide plate 128, the second air duct 126is divided into the third sub-duct 126 a and the fourth sub-duct 126 b.In this way, the wind may be evenly distributed to the first air outlets111 b and the second air outlets 112 b, reducing the loss in the airflowing, allowing the air to flow to various positions of the useraccurately, and increasing the air flowing efficiency.

In the present embodiment, as shown in the cross section of FIG. 22, thefan assembly 20 may rotate clockwise. The wind may flow out of the fanassembly 20 from a position near the second connection plate 118 along atangent direction. Subsequently, the wind may be driven to the secondair duct 126 due to rotational inertia. Further, the wind may flow alongthe second wind guide portion 124 and the second auxiliary guide plate128, and the curved second auxiliary guide plate 128 may furtheraccelerate a speed of the wind. At last, the wind may flow out of theneck fan through the first air outlet 111 b away from the secondconnection plate 118. In this way, the wind flowing out of the first airoutlet 111 b may be different from the wind flowing out of the secondair outlet 112 b, where the wind is compressed to flow out of the secondair outlet 112 b. In this way, a speed and a force of the wind flowingout of the air outlets may be improved.

In some embodiments, the neck fan may include the fan assembly 20 and ashell portion 11 or 12. The shell portion 11 or 12 may include the firstportion 111, the second portion 112, and the third portion 113. Thethird portion 113 is connected between the first portion 111 and thesecond portion 112. The first portion 111 defines the first receivingcavity 111 and the first air outlet 111 b communicating with the firstreceiving cavity 111 a. The second portion 112 defines the secondreceiving cavity 112 a and the second air outlet 112 b communicatingwith the second receiving cavity 112 a. The third portion 113 definesthe third receiving cavity 113 a. The third receiving cavity 113 a isbetween the first receiving cavity 111 a and the second receiving cavity112 a, and communicates with the first receiving cavity 111 a and thesecond receiving cavity 112 a. The shell portion 11 or 12 defines theair inlet 114 communicating with at least one of the first receivingcavity 111 a, the second receiving cavity 112 a, and the third receivingcavity 113 a. The fan assembly 20 is at least partially received in thethird receiving cavity 113 a and is configured to guide the air from theair inlet 114 to flow to the first air outlet 111 b and the second airoutlet 112 b.

In the present embodiment, the fan assembly 20 is at least partiallyreceived in the third receiving cavity 113 a and is configured to guidethe air from the air inlet 114 to flow to the first air outlet 111 b ofthe first portion 111 and the second air outlet 112 b of the secondportion 112 respectively. Since the air is flowing out of the first airoutlet 111 b and the second air outlet 112 b, the amount of air flow isincreased, the air flowing efficiency is increased, and the user may becooled rapidly. Further, the wind generated from the fan assembly 20 isflowing to two opposite sides of the fan assembly to the first airoutlet 111 b and the second air outlet 112 b respectively, avoiding areduced air flowing efficiency caused by a large amount of air flowingto the end portion of the shell, such that the wind noise may bereduced, the wind loss may be reduced, and the air flowing efficiencymay be increased. In addition, the user's hair may not be caught by thefan assembly 20 easily, enabling the user to use the neck fan safely.Further, the fan assembly 20 is disposed between the first air outlet111 b and the second air outlet 112 b. A reduced cooling effect of aneck fan in the art, which is caused by a free end of the neck fan beinga wind-free zone E, may be solved. In the present embodiment, the end ofthe first portion 111 away from the third portion 113 defines the firstair outlet 111 b, enabling the air/wind to flow out of the fan throughthe first air outlet 111 b to cover the user's face completely.Therefore, the user's mouth, nose, and so on may be cooled.

As shown in FIGS. 23-25, the neck fan includes an arc-shaped shell 10and a diagonal fan assembly 30. The shell 10 includes an air inletportion shell 102 and an air outlet portion shell 101 connected to theair inlet portion shell 102. In the present embodiment, the air outletportion shell 101 may be adapted to and worn to the user's neck. The airinlet portion shell 102 is connected to each of two ends of the airoutlet portion shell 101. The air inlet portion shell 102 defines areceiving space. The air outlet portion shell 101 defines an air outlet1011. A partition plate 20 is received inside the air inlet portionshell 102. The partition plate 20 defines a plurality of through holes201. A side wall of the air inlet portion shell 102 is disposed betweenthe partition plate 20 and an end face of the air inlet portion shell102 away from the air outlet portion shell 101. The side wall defines anair inlet 1021. The diagonal fan assembly 30 is received in the airinlet portion shell 102 and is configured to guide the external air toflow through the through holes 201 to the air outlet 1011.

The air may enter the diagonal fan assembly 30 along a directioninclined to an axis of the diagonal fan assembly. The diagonal fanassembly 30 may drive the air, which flows along the direction inclinedto the axis of the diagonal fan assembly 30, to flow along a radialdirection. In this way, the loss of air flowing may be reduced, and theamount of air flowing may be improved. Further, a wind pressure and awind speed at the air outlet 1011 may be uniform, improving the user'sexperience. The external air may enter the neck fan through the throughholes 201 of the partition plate 20, such that the air may flow into theneck fan uniformly, reducing the wind noise.

As shown in FIGS. 23-25, the air outlet portion shell 101 and the airinlet portion shell 102 may be detachably connected, through a buckle ormagnetics. Detachable connection allows the diagonal fan assembly 30 inthe air inlet portion shell 102 to be maintained easily.

As shown in FIGS. 23-25, the partition plate 20 may be disposed at amiddle portion of the air inlet portion shell 102, dividing the airinlet portion shell 102 into a placement portion 1022 and an air inletportion 1023. A side wall of the air inlet portion 1023 defines the airinlet 1021. Defining the air inlet 1021 in the side wall may reduce thewind noise.

The diagonal fan assembly 30 may guide the air from the air inlet 1021to flow through the through holes 201 to the air outlet 1011. Thepartition plate 20 allows the air to flow from the air inlet 1021through the through holes, enabling the air to uniformly enter the neckfan, reducing the wind noise.

The placement portion 1022 and the air inlet portion 1023 may beintegrally formed as one piece.

In some embodiments, the placement portion 1022 and the air inletportion 1023 may be detachably connected. The partition plate 20 isdisposed on an end face of the air inlet portion 1023 near the placementportion 1022 or disposed on an end face of the placement portion 1022near the air inlet portion 1023.

In some embodiments, the diagonal fan assembly 30 is at least partiallyarranged in the placement portion 1022 and is configured to guide theair from the air inlet 1021 to flow through the through holes 201 to theair outlet 1011. The diagonal fan assembly 30 may include an impeller301 and a motor 302 driving the impeller 301 to rotate. The impeller 301may include a first wind guide cone 3011 and diagonal blades 3014arranged on the first wind guide cone 3011. The first wind guide cone3011 is configured to guide the air.

In some embodiments, as shown in FIGS. 25-27, an inner wall of the firstwind guide cone 3011 facing the motor 302 may extend along a loop toform a placement column 3012. A rotation shaft 3013 is arranged insidethe first wind guide cone 3011. A diameter of the placement column 3012is less than a diameter of a sleeve 3031. The placement column 3012 isat least partially received in the sleeve 3031 and surrounds an outerperiphery of the motor 302.

As shown in FIGS. 24-26, the diagonal fan assembly 30 may furtherinclude a wind guide member 303. The wind guide member 303 may includethe sleeve 3031, stator blades 3032, a wind guide ring 3033, and asecond wind guide cone 3034. The stator blades 3032 are arranged on anouter wall of the sleeve 3031. The wind guide ring 3033 is connected tothe stator blades 3032 along a circumferential direction. The secondwind guide cone 3034 is arranged at an end face of the sleeve 3031 andfaces the air outlet portion shell 101. The motor 302 may be received inthe sleeve 3031.

The second wind guide cone 3034 may collect the air, which has enteredthe neck fan, and guide the air to flow into the air outlet portionshell 101. In this way, the air may flow into the air outlet portionshell 101 uniformly, reducing the wind noise. After receiving the motor302 into the sleeve 3031, the sleeve 3031 may be sealed, improving airtightness of the neck fan. In this way, the motor 302 may be protected,and the motor may be safe while the neck fan is being used.

In some embodiments, the diagonal fan assembly 30 may be completelyreceived in the air inlet portion shell 102.

In some embodiments, a portion of the diagonal fan assembly 30 may bereceived in the air inlet portion shell 102, and another portion of thediagonal fan assembly 30 may extend to be received in the air outletportion shell 101. For example, the impeller 301 and the motor 302 maybe received in the air inlet portion shell 102, and the wind guidemember 303 may extend to be received in the air outlet portion shell101.

In some embodiments, when the second wind guide cone 3034 of the windguide member 303 extends to be received in the air outlet portion shell101, the end face of the air outlet portion shell 101 near the air inletportion shell 102 defines an expansion opening, such that the air outletportion shell 101 may be adaptively connected to the air inlet portionshell 102 and receive the second wind guide cone 3034.

As shown in FIGS. 23-25, the neck fan may further include an externalshell 40 detachably connected to the air inlet shell portion 102. Apower assembly 50 may be received in the external shell 40 and/or theair outlet portion shell 101. The power assembly 50 may be electricallyconnected to the diagonal fan assembly 30. The power assembly 50 may bea USB port and/or a rechargeable battery.

In some embodiments, a control plate may be received in the externalshell 40 and/or the air outlet portion shell 101. The battery may beconnected to the control plate. The control plate may b connected to thediagonal fan assembly 30. In this way, the control plate and the batterymay be received inside the arc-shaped shell 10.

The rechargeable battery may be received in the external shell 40. Arechargeable battery having a relatively large capacity may be arranged,based on actual demands. In this way, the neck fan may operate for arelatively long period of time. While manufacturing, the battery may bereceived in the arc-shaped shell 10 only or in the external shell 40only; alternatively, one battery may be received in both the arc-shapedshell 10, and another battery may be received in the external shell 40.In this way, when the battery in the arc-shaped shell 10 is out ofpower, the battery in the external shell 40 may supply the power, suchthat the neck fan may operate for a relatively long period of time.

In some embodiments, the external shell 40 may be arc shaped. Theexternal shell 40 may include a first shell 401 and a second shell 402fastened with the first shell 401. The power assembly 50 and/or thecontrol plate may be disposed between the first shell 401 and the secondshell 402.

Since the external shell 40 is detachably connected to the air inletportion shell 102, the power assembly 50 in the external shell 40 may bemaintained or recharged easily. When the rechargeable battery isreceived in the arc-shaped shell 10, the rechargeable battery in theexternal shell 40 may serve as a backup battery, such that the neck fanmay operate for a relatively long period of time.

The external shell 40 may be detachably connected to the air inletportion shell 102 through a buckle or the like.

In some embodiments, as shown in FIGS. 28 and 29, the air inlet portion1023 may include two end walls away from two placement portions 1022. Afirst magnetic member 601 may be arranged on each of the two end walls,and a second magnetic member 602 may be arranged on each of two endfaces of the external shell 40. The first magnetic member 601 may bealign to and attracted to the second magnetic member 602.

Each of the first magnetic member 601 and the second magnetic member 602may be a magnet. Alternatively, one of the first magnetic member 601 andthe second magnetic member 602 may be the magnet, and the other one ofthe first magnetic member 601 and the second magnetic member 602 may bea metal (such as iron, iron alloy, and the like) that can be attractedby the magnet.

Magnetic attraction between the first magnetic member 601 and the secondmagnetic member 602 allows the external shell 40 to be detachablyconnected to the air inlet portion shell 102, such that the externalshell 40 may be connected quickly, and may be detached easily.

As shown in FIGS. 26, 28 and 29, an end wall of the placement portion1022 may extend downwardly to form a tab 701. An upper end of theexternal shell 40 may be recessed inwardly to define a slot 702 foradaptively receiving the tab 701. Receiving the tab 701 into the slot702 allows the external shell 40 to be stably connected to the air inletportion shell 102.

As shown in FIGS. 28 and 29, the external shell 40 is detachablyconnected to the air inlet portion shell 102. In the present embodiment,one of the end wall of the placement portion 1022 and the end face ofthe external shell 40 may be arranged with a probe 801, and the otherone of the end wall of the placement portion 1022 and the end face ofthe external shell 40 may be arranged with a contact 802. When theexternal shell 40 is attractively connected to the air inlet portionshell 102, the contact 802 contacts the probe 801 for conducting. Inthis way, the rechargeable battery in the external shell 40 iselectrically connected to the motor 302 of the diagonal fan assembly 30.

According to the present embodiment, the diagonal fan assembly 30 mayguide the air, which enters the neck fan along the direction inclined tothe axis of the fan assembly 30, to flow along the radial direction,such that the loss in the air flowing may be reduced, and the amount ofair flowing may be increased. The wind pressure and the wind speed atthe air outlet may be uniform. In addition, the battery may be receivedin at least one of the air outlet portion shell and the external shell40, such that operation duration of the neck fan may be improvedsignificantly.

FIGS. 30-37 show a neck fan according to another embodiment of thepresent disclosure.

FIG. 30 is a structural schematic view of a neck fan according to anembodiment of the present disclosure. In the present embodiment, a neckfan 01 includes a bracket assembly 10 and a wind turbine positionedarranged inside the bracket assembly 10. The bracket assembly 10 definesan air outlet 11 and an air inlet 12. The wind turbine drives externalair to flow to an inside of the bracket assembly 10 through the airinlet 12, and to further flow to the air outlet 11, such that the airmay flow to an outside of the neck fan through the air outlet 11.

In some embodiments, a plurality of air outlets 11 may be defined.Defining the plurality of air outlets 11 may increase a coverage area ofair flowing of the neck fan 01. A plurality of air inlets 12 may bedefined. Defining the plurality of air inlets 12 may increase an airintake rate of the neck fan 01.

The bracket assembly 10 is configured to hang the neck fan 01 around theuser's neck. For example, in the present embodiment, the bracketassembly 10 is circular shaped, such that the bracket assembly 10 maywell hang around the user's neck, and the air outlets 11 may face theuser's cheek or neck. In this way, while the user is wearing the neckfan 01, the air out of the air outlets 11 may flow towards the user'scheek or neck.

As shown in FIGS. 30 and 23, FIG. 30 is a structural schematic view of aneck fan according to an embodiment of the present disclosure, and FIG.31 is an exploded view of the neck fan shown in FIG. 30.

The bracket assembly 10 may include a first bracket 100, a secondbracket 200 and a third bracket 300. The second bracket 200 may beconnected to the first bracket 100 and the third bracket 300. Each ofthe first bracket 100, the second bracket 200 and the third bracket 300may be a curved bracket. When the first bracket 100, the second bracket200 and the third bracket 300 are connected, the three curved bracketsmay cooperatively form a ring-shaped body, such that the neck fan 01 mayhang around the user's neck. The second bracket 200 may be disposedbetween the first bracket 100 and the third bracket 300, and may face aback of the user's neck. The first bracket 100 and the third bracket 300are connected to two opposite ends of the second bracket 200 and facetwo opposite sides of user's neck. An opening may be defined between thefirst bracket 100 and the third bracket 300, allowing the bracketassembly 10 to sleeve the user's neck.

In some embodiments, the second bracket 200 may be arranged with acooling sheet 203. While the user is wearing the neck fan 01, thecooling sheet 203 may attach to the back of the neck, such that the backof the neck may be cooled, providing a better user experience.

In some embodiments, two ends of the second bracket 200 may define afirst slot 201 and a second slot 202, respectively. An end of the firstbracket 100 is arranged with a first buckle 101, and an end of the thirdbracket 300 is arranged with a second buckle 301. When the secondbracket 200 is connected to the first bracket 100 and the third bracket300, the first buckle 201 may be fastened to the first slot 101, and thesecond buckle 301 is fastened to the second slot 202. In addition, atleast one of the first buckle 101 and the second buckle 301 may bearranged with a rotation shaft, and at least one of a wall of the firstslot 201 and a wall of the second slot 202 may define a correspondingshaft hole. In this way, the first bracket 100 is rotatably connected tothe second bracket 200, and the third bracket 300 is rotatably connectedto the second bracket 200. In this way, a distance between the firstbracket 100 and the third bracket 300 bracket may be adjustable toaccommodate various neck sizes of various users.

In the present embodiment, the neck fan 01 may include at least threewind turbines. Each of the first bracket 100, the second bracket 200,and the third bracket 300 bracket define an air duct, the air outlets 11and the air inlets 12. One wind turbine is received in each of the airduct of the first bracket 100, the air duct of the second bracket 200,and the air duct of the third bracket 300. The wind turbine generates anair flow for each air duct.

In some embodiments, the first bracket 100, the second bracket 200 andthe third bracket 300 may be made of metal or plastics.

In other embodiments, the bracket assembly 10 may include a fourthbracket or more brackets, and each bracket defines a respective air ductand receives a respective wind turbine. The present disclosure does notlimit the number of the brackets.

As shown in FIGS. 32 and 33, FIG. 32 is a structural schematic view of afirst bracket of a neck fan according to an embodiment of the presentdisclosure, and FIG. 33 is an exploded view of the first bracket and awind turbine of the embodiment shown in FIG. 32.

An outer circumference of the first bracket 100 defines the plurality ofair outlets 11. while the neck fan is being worn to the user, theplurality of air outlets 11 may face the user's face. The air inlets 12are defined in two sides of the first bracket 100 and communicate withthe air outlets 11. In some embodiments, the first bracket 100 may bearranged with a power supply interface 102. The power supply interface102 may be configured to connect to a power source for charging the neckfan.

In detail, the first bracket 100 may include a first shell 110 and asecond shell 120. The first shell 110 and the second shell 120 may beconnected to cooperatively define a receiving slot 103. The wind turbine160 may be received in receiving slot 103. That is, each of the firstshell 110 and the second shell 120 is a shell having an opening. Whenconnecting the two shells, the opening of the first shell 110 may alignto and communicate with the opening of the second shell 120, such thatthe receiving slot 103 may be formed.

In some embodiments, a portion of the second shell 120 near the openingis arranged with a plurality of third buckles 121. The plurality ofthird buckles 121 may be arranged around a circumference of the openingof the second shell 120. A portion of the first shell 110 near theopening defines a plurality of third slots corresponding to the thirdbuckles 121. When the first shell 110 and the second shell 120 arefastened, the plurality of third buckles 121 may be fastened with theplurality of third slots. In other embodiments, the first shell 110 maybe connected to the second shell 120 by bonding, screwing, and the like.

In the present embodiment, each of the first shell 110 and the secondshell 120 may be a curved shell. When the first shell 110 and the secondshell 120 are fastened to each other, the first bracket may be welladapted to the user's neck. In other embodiments, the first shell 110and the second shell 120 may be in other shapes, which will not belimited by the present disclosure.

Further, the neck fan may further include a battery 180 and a circuitboard 170. The circuit board 170 may be electrically connected to thebattery 180 and the wind turbine 160. The battery 180 may be arechargeable battery. The battery 180 may be configured to storeelectrical energy and supply power to the wind turbine 160. The circuitboard 170 may be configured to control a power of the wind turbine 160and may further be arranged with a charging circuit for the battery 180.

In some embodiments, the first bracket 100 may further include a supportframe 150. The support frame 150 may be fixedly arranged inside thefirst shell 110 or the second shell 120, and may be received in thereceiving slot 103. The battery 180 and the circuit board 170 may bearranged inside the support frame 150.

The air inlets 12 may communicate with the receiving slot 103 and may beconfigured to allow the external air to be driven by the wind turbine160 to flow into the receiving slot 103.

Each of the air inlets 12 may be a groove defined in the first shell 110or the second shell 120. Alternatively, each of the air inlets 12 may bea through hole defined in the first shell 110 or the second shell 120.

As shown in FIGS. 33 and 34, FIG. 34 illustrates an interior of thefirst bracket and the wind turbine of the embodiment shown in FIG. 33.In the present embodiment, arranging the air turbine 160 inside thefirst shell 110 and defining the air duct in the first shell 110 will betaken as an example to illustrate the neck fan. In other embodiments,the air turbine 160 and the air duct may also be arranged in the secondshell 120. Arrows in the drawing indicate directions of the air flowingin the air duct.

In the present embodiment, the wind turbine 160 may include a bearingportion 161 and a fan portion 162 arranged around the bearing portion161. The bearing portion 161 is fixedly arranged inside the first shell110. The bearing portion 161 drives the fan portion 162 to rotate,generating the wind to flow to circumference of the fan portion 162. Anelectric motor may be arranged inside the bearing portion 161. The windturbine 160 may drive the fan portion 162 to generate the wind by meansof motor driving. The wind turbine 160 may rotate counterclockwise orclockwise.

In some embodiments, the first shell 110 may further define a wire slot116 for receiving wires, such that circuit boards or wind turbines inother shells may be electrically connected.

In the present embodiment, the first shell 110 defines two air ducts, anair duct I and an air duct II. The air duct I and the air duct II locateon two opposite sides of the wind turbine 160. Since the fan portion 162of the wind turbine 160 is able to generate the wind towards thecircumference of the wind turbine 160, the wind turbine 160 is able toprovide air flowing in various directions to the air duct I and the airduct II. In some embodiments, the first shell 110 may define three ormore ducts therein.

A plurality of air outlets 11 may be defined. Each of the air duct I andthe air duct II may communicate with a corresponding air outlet 11 toguide the air flowing in the air duct to the corresponding air outlet11. In the present embodiment, an air flowing direction in the air ductI will be taken as an example to illustrate the present embodiment. Airflowing directions in other air ducts in the first bracket or airflowing directions in air ducts in other brackets may be referred to thefollowing embodiment.

In the present embodiment, the air outlet 11 is defined in a first sidewall 111 of the first shell 110. The first side wall 111 may be any ofside walls of the first shell 110 configured to define the air duct I.

The wind turbine 160 is disposed adjacent to the first side wall 111.The wind turbine 160 provides air flowing to the air duct I. Further, anair flowing direction of the air, which is provided by the wind turbine160, flowing in the air duct I is parallel to the first side wall 111.The plurality of air outlets 11 are distributed in the first side wall111 and are spaced apart from each other along an extending direction ofthe first side wall 111. That is, the plurality of air outlets 11 arearranged on the first side wall 111 along the flowing direction of theair generated by the wind turbine 160.

In the art, the air generated by the wind turbine to the air duct mayflow towards the extending direction of the first side wall. When theair flows past an air outlet near the wind turbine, the air may continueflowing, maintaining its original flowing direction, and this is becausethe air does not flow towards the air outlet. When the air flows toreach an end of the air duct, most of the air in the air duct may gatherat the end, and an air pressure at the end of the air duct may increase.In this case, the air outlet at the end of the air duct may be impactedby the air significantly, and the air may generate resonance, producingthe wind noise.

To solve the above technical problem, in the present disclosure, a windguide member 13 may be arranged inside the first bracket 110. Forexample, the first bracket 110 defines the air duct, and the wind guidemember 13 may be received in the air duct. When the air flows along thewind guide member 13, the Coanda Effect may be caused, and the originalflowing direction of the air may be changed. In this way, the air mayflow along a surface of the wind guide member 13, flowing towards theair outlet 11. For example, the wind guide member 13 may be disposed ona wall of the shell near the air outlet 11 or received in the air outlet11. In this way, an air flowing intensity of the air outlet 11 may beincreased, and an air flowing intensity of other outlets 11, which maybe excessively large, may be reduced. In this way, the wind noise at theair outlet 11 which has the excessively large air flowing intensity maybe reduced.

As shown in FIGS. 34 and 35, FIG. 35 is an enlarged view of a portion Aof the embodiment shown in FIG. 34.

In the present embodiment, the air duct I may be communicated with atleast two air outlets 11. The at least two air outlets 11 may include afirst air outlet 1101 and a second air outlet 1102. The first bracket100 may further include a wind guide plate 117, serving as another windguide member. The wind guide plate 117 may be spaced apart from the windguide member 13. For example, the wind guide plate 117 and the windguide member 13 may be disposed at two sides of the air duct I. The windguide plate 117 may be configured to direct the air generated by thewind turbine 160 to the first air outlet 1101 and the second air outlet1102.

In some embodiments, the wind guide plate 117 may be a curved plate. Anend of the wind guide plate 117 is connected to a shell wall thatdefines the first air outlet 1101. An end of the wind guide plate 13 isconnected to a shell wall that defines the second air outlet 1102. Whenthe air generated by the wind turbine 160 is flowing towards the windguide plate 117, the air flowing direction may be affected by the windguide plate 117, such that the air may flow towards the first air outlet1101 and the second air outlet 1102.

In the present embodiment, the air flowing in the air duct I may includea first air flow α, a second air flow β and a third air flow γ. Curvesand arrows in FIG. 35 indicate air flowing directions in the air duct.The first air flow α, the second air flow β and the third air flow γ arelabeled for understanding the air flowing in various regions of the airduct. Actual air flows in the air duct I shall not be limited to thefirst air flow α, the second air flow β and the third air flow γ.

The first air flow α, the second air flow β and the third airflow γ maybe parallel to each other.

The first air flow α is flowing near the wind guide member 13, and thesecond air flow β is flowing near the wind guide plate 117. The thirdair flow γ is flowing between the first air flow α and the second airflow β.

Since the second air flow β is flowing closest to the air guide 117, thesecond air flow β is easily affected by the wind guide plate 117, suchthat the second air flow β may flow out of the neck fan through thesecond air outlet 1102. When the wind guide member 13 is not arranged,the flowing direction of the first air flow α and the flowing directionof the third air flow γ do not change when passing the first air outlet1101, but instead, the first air flow α and the third air flow γcontinue flowing straightly towards the wind guide plate 117. This isbecause the first air flow α and the third air flow γ are distant fromthe wind guide plate 117. Only when the first air flow α and the thirdair flow γ encounter the wind guide plate 117, the flowing directionsthereof may change, and the first air flow α and the third air flow γmay flow towards the second air outlet 1102. In this way, air flows inthe second air outlet 1102 may include an air flow obtained bypressurizing the first air flow α, the second air flow β and the thirdair flow γ. The air flowing intensity in the second air outlet 1102 maybe excessively large. An air flow that has an excessively largeintensity may impact the second air outlet 1102, generating the windnoise and affecting the user experience.

In the present embodiment, the wind guide member 13 may be received inthe air duct I. The wind guide member 13 may be disposed near the firstair outlet 1101 and disposed on the first side wall 111. After flowingpast the wind guide member 13, first air flow α may be affected by thewind guide member 13 to flow out of the neck fan through the first airoutlet 1101. That is, the first air flow α does not flow out of the neckfan through the second air outlet 1102. In this way, the amount of airflowing through the second air outlet 1102 may be reduced, reducing thewind noise at the second air outlet 1102.

In detail, the wind guide member 13 may be a protrusion arranged on thefirst side wall 111 and protrudes towards the air duct I. The wind guidemember 13 protruding from the first side wall 111 towards the air duct Iallows the Coanda Effect to be caused while the first air flow α flowingpast the protrusion. The wind guide member 13 may include a wind-wardportion 1301 and wind-guide portion 1302. The wind-ward portion 1301 maybe connected to the wind-guide portion 1302. The wind-ward portion 1301and the wind-guide portion 1302 may be fixedly arranged inside the firstshell 110. The wind guide member 13 and the first shell 110 may beintegrally arranged as one piece. Alternatively, the wind guide member13 may be connected to the shell 110 by fastening or bonding.

The wind-ward portion 1301 may be opposite to the wind turbine 160. Thefirst air flow α may flow directly towards the wind-ward portion 1301.The wind-guide portion 1302 is connected to the wind-ward portion 1301to form a projection protruding towards the air duct I. That is, acertain angle is between the wind-guide portion 1302 and the wind-wardportion 1301. A face of a connected portion between the wind-guideportion 1302 and the wind-ward portion 1301 may be a convex face thathas a certain curvature.

In some embodiments, the convex face of connected portion between thewind-guide portion 1302 and the wind-ward portion 1301 may be a curvedface, a spherical face, or a cylindrical face.

When the first air flow α flows directly towards the wind-ward portion1301, a surface friction may be generated between the first air flow αand the wind-ward portion 1301, an original flowing direction of thefirst air flow α may change, and the first air flow α may flow alongsurfaces of the wind-ward portion 1301 and the wind-guide portion 1302.The wind-guide portion 1302 is connected the wall of the shell thatdefines the first air outlet 1101. In this way, the first air flow αflows along the wind-guide portion 1302 to the first air outlet 1101,reducing the amount of the air flowing through the second air outlet1102.

Since the first air flow α flows through the first air outlet 1101, anair pressure of a gap between the first air outlet 1101 and the secondair flow β may be reduced. Therefore, the third air flow γ may flowtowards the first air flow α to fill a space where the first air flow αoriginally flows. The third air flow γ may be affected by the wind-guideportion 1302 and may be appropriately shifted towards the first air flowα.

Similarly, the second air flow β may also be affected by the wind-guideportion 1302 and shifted towards the first air flow α. A portion of thesecond air flow β or the third air flow γ may be affected by the firstair flow α shifting to shift towards the first air flow α, and may flowout of the neck fan through the second air outlet 1102. Another portionof the second air flow β or third air flow γ may be affected by the windguide plate 117, the air flowing directions thereof may change, and theanother portion of the second air flow β or third air flow γ may flowout of the neck fan through the second air outlet 1102. Therefore, thesecond air flow β and the third air flow γ in the present embodiment donot completely rush to the wind guide plate 117, changing flowingdirections only after encountering the wind guide plate 117, but mayshift towards the first side wall 111 since the first air flow α shifts.Compared to the neck fan in the art, noise generated by the air flowhitting the wind guide plate 117 may be reduced in the presentembodiment.

Therefore, in the present embodiment, the wind guide member 13 mayreduce the wind noise generated by the air flowing through the secondair outlet 1102 by reducing the air flowing intensity near the secondair outlet 1102. Further, the wind guide member 13 allows the airflowing direction at the second air outlet 1102 to be changed, such thatthe air may flow towards the second air outlet 1102 directly, instead offlowing out of the second air outlet 1102 only after rushing at andbeing cut by the second air outlet 1102.

Further, in the present embodiment, the wind guide member 13 reduces thewind noise generated by the neck fan, and further increases the amountof air flowing through the air outlet 11, which is an air outlet for aweak air flow. In this way, the amount of air flowing through each ofthe plurality of air outlets may be uniform.

When the wind guide member 13 is not arranged, the first air outlet 1101is defined in the first side wall 111. The first side wall 111 isrelatively parallel to the first air flow α. In this way, the first airflow α would not flow out through the first air outlet 1101 when passingthe first air outlet 1101. Therefore, the air flowing intensity at thefirst air outlet 1101 may be weaker, and the air flowing intensity atother air outlets 11 may be excessively strong.

In the present embodiment, the first side wall 111 is arranged with thewind guide portion 13. The wind guide portion 13 may be closer to thewind turbine 160 compared to the first air outlet 1101. When the firstair flow α flowing against the wind-ward portion 1301 of the wind guidemember 13, the surface friction may be generated between the first airflow α and the wind-ward portion 1301, the air flowing direction of thefirst air flow α may change accordingly, and the first air flow α mayflow along the surface of the wind-ward portion 1301 and the wind-guideportion 1302. The wind-guide portion 1302 is connected to the shell wallthat defines the first air outlet 1101. At last, the first air flow αmay flow along the wind-guide portion 1302 towards the first air outlet110, increasing the amount of the air flowing at the first air outlet1101.

In some embodiments, the air guide member 13 may further be arranged atthe shell wall that defines other air outlets 11 to increase the airflowing intensities at corresponding air outlets 11.

According to the present embodiment, the wind guide member 13 may bearranged inside the first bracket 100 to change the flowing directionsof the air in the air duct, and may be configured to direct air flows tocorresponding air outlets 11. In this way, a problem of various airflowing efficiencies at various air outlets 11 may be solved, the windnoise at the air outlet 11 may be reduced, and the air flowing througheach of the plurality of air outlets 11 may be uniform. User'sexperience may be improved, and a structure of the neck fan may besimple, such that the neck fan may be easily prepared.

As shown in FIG. 36, FIG. 36 is an exploded view of a second bracket anda wind turbine of a neck fan according to an embodiment of the presentdisclosure.

The second bracket may include a third shell 210, a fourth shell 220, awind turbine 160, and a cooling sheet 203. The third shell 210 may befastened to the fourth shell 220. The air duct may be defined in thethird shell 210 and the fourth shell 220. The wind turbine 160 may bereceived in the third shell 210 and the fourth shell 220. The coolingsheet 203 may be connected to the third shell 210 and configured tocontact the back of the user's neck.

Each of two ends of the third shell 210 and two ends of the fourth shell220 may define the air inlet 12. The third shell 210 may define theplurality of air outlets 11 communicating with the air duct. An innerside of the third shell 210 and the fourth shell 220 may further definethe air inlet 12 communicating with the air duct. The wind turbine 160may provide the air flowing to the air duct, and the air may furtherflow out of the fan through the air outlets 11. The air outlets 11 maybe defined in the fourth shell 220.

Arrangement of the third shell 210, the fourth shell 220, and the windturbine 160 may be referred to the arrangement for the first bracket asillustrated in the above, and will not be repeatedly described herein.

As shown in FIGS. 36 and 37, FIG. 37 illustrates an interior of a thirdshell of the embodiment shown in FIG. 36. Curves and arrows in FIG. 37indicate air flowing directions in the air duct.

In the present embodiment, the air duct may be defined in the thirdshell 210, and the wind turbine 160 may be arranged inside the thirdshell 210. The air duct in the third shell 210 may include an air ductIII and a fourth air duct IV. The third air duct III and the fourth airduct IV may be defined at two opposite sides of the wind turbine 160.The air flows provided by the wind turbine to the air duct III and theair duct IV may flow along different directions. The air duct III andthe air duct IV may communicate to corresponding air outlets 11.

In the present embodiment, the wind guide member 13 is arranged near theair outlet 11 that communicates with the air duct III. The wind flowingin the air duct III may be affected by the wind guide member 13 whenflowing past the wind guide member 13, causing the Coanda Effect, suchthat the air may flow out of the fan through the air outlet 11, an airflowing intensity at the air outlet 11 may be increased, and an airflowing intensity and wind noise at other air outlets may be reduced.

Structures of the air duct and the wind guide member 13 in the thirdshell 210 may be similar to those of the first bracket, and may bereferred to the above embodiments.

Therefore, in the present embodiment, the wind guide member 13 may bearranged inside the third shell 210, a problem of various air outletshaving various air flowing efficiencies may be solved, and the windnoise at the air outlets may be reduced.

A structure of the third bracket may be similar to that of the firstbracket, i.e., the wind guide member may be arranged in the thirdbracket. Therefore, the structure of the third bracket will not berepeatedly described herein.

According to the present embodiment, the wind guide member may bereceived in the air duct for guiding the air to flow to correspondingair outlets. The air flowing direction may be changed and may bedirected to various air outlets. The wind noise caused by air rushingmay be reduced. The air outlet, which has an excessively low airpressure in the art, may now have an increased air pressure, and the airoutlet, which has an excessively high air pressure in the art, may nowhave a reduced air pressure. The problem of various air outlets havingvarious air flowing efficiencies may be solved.

FIGS. 38-44 shows a neck fan according to another embodiment of thepresent disclosure.

An arrow X in the figures indicate a front-rear direction, i.e., aradial direction. An arrow Y in the figures indicate a horizontaldirection, i.e., a left-right direction. An arrow Z in the figuresindicate a vertical direction, i.e., an up-down direction.

As shown in FIGS. 38-40, the neck fan 1 may include a shell 1, a fanassembly 2, and an inner shell 3. The shell 1 may be configured to hangaround the user's neck. The shell 1 may define an air inlet C1, an airoutlet C2, and an air duct C3 between the air inlet C1 and the airoutlet C2. The fan assembly 2 may be configured to guide the externalair into the neck fan through the air inlet C1, and guide the air toflow through the air duct C3 to reach the air outlet C2. The inner shell3 may be arranged inside the shell 1. The fan assembly 2 may be receivedin an inner space of the inner shell 3. The inner space of the innershell 3 may communicate with the air inlet C1 and the air duct C3. Theinner shell 3 may protect the fan assembly 2, preventing the fanassembly 2 from being damaged caused by being crushed by externalforces. Further, the inner shell 3 may prevent the user's hair fromentering the air inlet C1 to reach the fan assembly 2. In this way, theinner shell 3 prevents the hair from winding turning blades of the fanassembly, protecting the user.

In some embodiments, the fan assembly 2 may be a turbine fan. Twoopposite sides of the turbine fan may be arranged with a first air inletwindow 21 and a second air inlet window respectively. The two airwindows are independent from each other, allowing the fan assembly tointake the air/wind from two opposite sides, such that the amount of airintaking may be increased, a wind stifling effect may not be caused, andthe wind nose may be reduced. A position of the inner shell 3corresponding to the first air inlet window 21 may be define a firstinner air inlet K1, and a position of the inner shell 3 corresponding tothe second air inlet window may be define a second inner air inlet K2.In this way, after the air enters the first inner air inlet K1 and thesecond inner air inlet K2, the air may quickly enter the first air inletwindow 21 and the second air inlet window respectively. Further, fanblades of the turbine fan may drive the air to flow to air duct to reachthe air outlet C2, such that the air may flow out of the neck fan. Inthis way, a contact speed between the air and the turbine fan may beincreased, increasing the air flowing efficiency, ensuring the amount ofair entering the fan, and increasing an efficiency of taking the air inthe inner shell 3 to flow through. Further, a distance that the airflows to reach the fan assembly 2 may be reduced, noise generated by airflowing may be reduced effectively, that is, the wind noise may bereduced.

In some embodiments, the shell 1 may define a receiving chamber 11 forreceiving the inner shell 3. In detail, the receiving chamber 11 may bedefined in an end portion of the shell 1. A side wall of the receivingchamber 11 may include at least one air inlet region. The air inlet C1is defined in the air inlet region. The air inlet C1 may communicatewith the first inner air inlet K1 and the second inner air inlet K2. Inthis way, the air in the shell 1 may flow into the first inner air inletK1 and the second inner air inlet K2.

In some embodiments, the inner shell 3 may include a first axial shellportion 31, a second axial shell portion 32, a radial shell portion 33.The first air inlet window 21 is arranged with the first axial shellportion 31. The second air inlet window is arranged with the secondaxial shell portion 32. The radial shell portion 33 is arranged along aradial direction of a rotation shaft of a fan of the turbine fan. The atleast one air inlet region may be spaced apart from the radial shellportion 33. Further, the at least one air inlet region may be disposedaway from the first inner air inlet K1 and the second inner air inletK2. In this way, the hair may be prevented from entering the air inletC1 to further reach an inside of the inner shell 3, such that the hairmay be prevented from winding the fan assembly 2. Therefore, in thepresent embodiment, hair stranding caused by the hair reaching theinside of the inner shell may be avoided, protecting the user. Inaddition, in the present embodiment, the air that enters the neck fanthrough the air inlet C1 may not be completely compressed into the firstinner air inlet K1 and the second inner air inlet K2. Since at least oneair inlet region is away from the first inner air inlet K1 and thesecond inner air inlet K2, the air may be separated to the first innerair inlet K1 and the second inner air inlet K2 respectively, preventingair compression. Therefore, the wind may not be squeezed, and the windnoise may be reduced.

In some embodiments, as shown in FIG. 41, the shell 1 is configured tohang around the user's neck. The at least one air inlet region mayinclude an upper air inlet region 111, a lower air inlet region 112,and/or an end air inlet region 113. The upper air inlet region 111 mayoperate cooperatively with the lower air inlet region 112 or the end airinlet region 113 to increase the amount of air inlet. Arranging thelower air inlet region 112 and the end air inlet region 113 allows theair inlets to be defined away from the user, such that the wind noisemay propagate away from the user, reducing the wind noise. Further,positions where the lower air inlet region 112 and the end air inletregion 113 are arranged prevents the user's hair from entering the fanassembly 2 and winding the fan blades while the neck fan is worn to theuser, ensuring the user's safety. In some embodiments, only the lowerair inlet region 112 may be arranged. Since the air inlet defined in thelower air inlet region facing downwards, preventing the hair or otherforeign matters from entering the air inlet due to the gravity. In someembodiments, only the end air inlet region 113 may be arranged. Sincethe air inlet defined in the end air inlet region 113 faces away fromthe user, noise of a fan motor or noise generated by the wind hitting awall of the air duct may propagate through the air inlet of the end airinlet region 113, propagating away from the user, reducing the windnoise significantly. In some embodiments, only the lower air inletregion 112 and the end air inlet region 113 are arranged, ensuring theamount of air intaking to be adaptive to any fan in any power. Asufficient number of air ducts are defined, and a sufficient amount ofair is intaken. Any combination of the upper air inlet region 111, thelower air inlet region 112, and the end air inlet region 113 may bearranged, as long as an application scenario can be satisfied.

In some embodiments, the external air may flow through the air inlet C1of the air inlet region along a first air inlet direction. After the airreaches the receiving chamber 11 by flowing through the air inlet C1,the air may flow through the first inner air inlet K1 or the secondinner air inlet K2 along a second air inlet direction. An angle betweenthe first air inlet direction and the second air inlet direction may bein a range of 0° to 90°. In some embodiments, the angle between thefirst air inlet direction and the second air inlet direction may be in arange of 85°-90°. In some embodiments, the angle between the first airinlet direction and the second air inlet direction may be 90°. In thisway, the fan assembly 2 intaking the external air and driving the air toflow from the air inlets to the air outlets may generate two differentair inlet directions. The two air inlet directions may be perpendicularto each other. In this way, even if the hair enters the shell 1 alongthe first air inlet direction, the hair may not be able to enter theinner shell 3 along the second air inlet direction. Therefore, the hairmay not wind the fan assembly 2, preventing hair stranding. Further, thefirst air inlet direction may be substantially perpendicular to thesecond air inlet direction, allowing fan blades of the fan assembly 2 tobe blocked, such that the external dust or water may not enter the fanassembly 2, protecting the fan assembly 2.

In some embodiments, as shown in FIGS. 40 and 41, the inner shell 3 mayfurther include a wind guide portion 34. The wind guide portion 32 maydefine a wind guide opening 341. The wind guide opening 341 maycommunicate with the first inner air inlet K1 and the second inner airinlet K2. In the present embodiment, the air inlet C1 is defined closelynear the wind guide portion 34 and away from the fan assembly 2. Asshown in FIG. 41, a rear air inlet region 114 is arranged, and the abovementioned air inlet C1 is defined in the rear air inlet region 114. Inthe present embodiment, the air inlet C1 may increase the amount of airinlet and increase an air intaking area, allowing the air that entersthe shell 1 may be distributed inside the shell 1 more evenly,preventing the wind from being squeezed, and reducing the wind noise.

In some embodiments, as shown in FIGS. 38-42, an edge of the wind guideopening 341 may be bent outwardly and abut against an inner wall of theshell 1, such that a gap between the edge of the wind guide opening 341and the inner wall of the shell 1 may be sealed. In this way, the airflowing out of the wind guide opening 341 may be prevented from flowingto the gap between the edge of the wind guide opening 341 and the innerwall of the shell 1. It shall be understood that, when the air flowingto the gap, the air may no flow along the air duct C3. By sealing thegap, the wind noise generated by disordered air circulation may bereduced, and the air flowing out of the wind guide opening 341 may becompletely flow along the air duct C3, ensuring the total amount of airflowing for generating the wind, and improving an air flowingefficiency.

In some embodiments, a diameter of the wind guide opening 341 maygradually increase along a direction facing the air duct C3. Increasingthe diameter allows the air to be separated, preventing the wind frombeing squeezed, and reducing the wind noise. Further, the air flowingdiameter is increased, increasing the amount of air reaching the airduct C3, and increasing the amount of wind flowing out of the neck fan,improving the user's experience.

In some embodiments, at least three sets of the inner shell 3 and thefan assembly 2 may be arranged. One set of the inner shell 3 and the fanassembly 2 may be arranged at each of a first end portion of the shell1, a second end portion of the shell 1, and a connection portion betweenthe first end portion and the second end portion. The connection portionmay be disposed at a middle of the shell 1. Arranging a plurality of fanassemblies 2 and the inner shells 3 may increase an area covered by thewind flowing out of the neck fan, improving the user's experience.

In some embodiments, as shown in FIG. 42, two wind guide portions 34 maybe arranged. The two wind guide portions 34 may guide the air to flowtowards two opposite directions. In detail, a wind guide direction ofthe wind guide opening 341 of one of the two wind guide portions 34 maybe opposite to a wind guide direction of the wind guide opening 341 ofthe other one of the two wind guide portions 34. For example, in theembodiment where two wind guide portions 34 are arranged, the fanassembly 2 may be arranged on the connection portion between the firstend portion and the second end portion. In this way, arranging one fanassembly 2 may guide air towards the first end portion and the secondend portion at the same time. In some embodiments, the fan assembly 2may be arranged on one of the first end portion and the second endportion. The fan assembly may be arranged at a middle of the first endportion and guide the air to flow towards two ends of the first endportion.

In some embodiments, an inner middle portion of the first shell 1 may bearranged with an attaching portion 4 for attaching the user's neck.Arranging the attaching portion 4 allows the shell 1 to attach to theuser's neck optimally. On one hand, the user may have a better hangingfeeling. On the other hand, the shell 1 may be tightly attached to theuser's neck, such that the neck fan may not fall off easily.

In some embodiments, the attaching portion 4 may include two attachingpads 41. Each of the two attaching pads 41 may be curved to fit with acurved shape of the user's neck. In this way, the curved shape of thepads may attach to the user's neck better, allowing the neck fan to hangto the neck more fixedly and stably.

In some embodiments, each of the two attaching pads 41 may be connectedto the shell 1 through an elastic movable member. The elastic movablemember may adjust the attaching pad 41 adaptively when the user ismoving or when the user's neck is turning, such that the two attachingpads may attach to the user's neck at all times, allowing the neck fanto tightly attach to the user's neck, preventing the neck fan fromfalling off when the user is moving. In addition, when the user ismoving, the elastic movable member prevents the attaching portion 4 fromrubbing the user's neck, protecting the user's neck.

In some embodiments, the elastic movable member may be a spring and/oran elastic roller. The spring may provide a cushioning effect, allowingthe attaching pads 41 to follow the user's neck in a movable manner. Theelastic rolling may provide a rolling and sliding effect, allowing theattaching pads 41 to slide for a relatively short distance, such thatthe user's neck may not be rubbed easily. Further, the elastic rollingmay be elastic, and therefore, the attaching pads 41 may follow theuser's neck in the movable manner and may elastically slide for a tinydistance. In this way, the neck fan may be prevented from falling offfrom the user's neck, ensuring tight attachment between the neck fan andthe user's neck. Further, the attaching pads 41 may not rub the user'sneck, improving the user's experience.

In some embodiments, the attaching pads 41 may be made of soft and/orelastic material, preventing from rubbing the user's neck, and arelative moving between the user's neck and the attaching pads 41 may bebuffered.

In some embodiments, the fan assembly 2 may include fan blades and amotor for driving the fan blades to rotate. Adjusting a rotating speedof the motor may control a rotating speed of the fan blades. In thisway, an air flowing intensity and an amount of air flowing may beadjusted.

In some embodiments, the shell 1 may be curved and tubular and may beadapted to a shape of the user's neck. Electronic elements may bearranged in the shell 1, such as a circuit board, a battery, variousmodules, and the like.

In some embodiments, the air outlet C2 may be defined in an inner sideand/or an upper face of the shell 1. In some embodiments, when the neckfan hangs around the user's neck, the inner side of the shell 1 facesthe user's neck. Defining the air outlet C2 in the inner side allows theair to flow towards the neck directly, improving the user's experienceoptimally. The upper face of the shell 1 may face an upper portion ofthe neck, the user's face, and the user's head. Therefore, defining theair outlet C2 in the upper face allows the air to flow towards theabove-mentioned portions of the user, and the air may flow to cover alarge area of the user, improving the user's experience.

In some embodiments, at least one inner shell 3 is arranged at the endportion of the shell 1. Arranging the inner shell 3 at the end portionof the shell 1 may increase a weight of the end portion of the shell 1.In this way, when wearing the neck fan, a larger weight of the endportion of the shell 1 allows a gravitational center of the neck fan tobe in a front portion of the neck fan. That is, the neck fan may bependant to a front of the user, preventing the neck fan from fall offfrom a back of the user's neck. Therefore, arranging the inner shell 3at the end portion of the shell 1 allows the neck fan to be stably wornto the user's neck.

In some embodiments, a battery 5 is arranged at an inner middle of theshell 1. The shell 1 is further arranged with a switch 13. The batterymay supply power for the fan assembly 2, and the switch 13 may controlthe fan assembly to operate or stop operating.

As shown in FIGS. 43 and 44, in some embodiments, the neck fan mayinclude the shell 1, the fan assembly 2, the inner shell 3 and a shakingabsorption member 6. The shell 1 may hang around the user's neck. Theshell 1 may define the air inlet C1, the air outlet C2, and an air ductC3 between the air inlet C1 and the air outlet C2. The air duct C3 maybe configured for allowing air flowing. The fan assembly 2 may beconfigured to guide the external air into the neck fan through the airinlet C1, and guide the air to flow through the air duct C3 to reach theair outlet C2. The inner shell 3 may be arranged inside the shell 1. Thefan assembly 2 may be received in the inner space of the inner shell 3.The inner space of the inner shell 3 may communicate with the air inletC1 and the air duct C3. The shaking absorption member 6 may be arrangedinside the shell 1 and configured to connect the inner shell 3 to theshell 1 for reducing shaking. In the present embodiment, arranging theshaking absorption member 6 prevents a direct contact between the innershell 3 and the shell 1. That is, vibration may not be transmitted tothe user's body, improving the user's experience. Further, since theinner shell and the shell do not directly contact each other, wear andtear between the inner shell and the shell may be eliminated, extendinga service life of the shell 1 and the inner shell 3.

A clamping portion 35 may be arranged on the inner shell 3 for clampingthe shaking absorption member 6. The shaking absorption member 6 may beconnected to the shell 1 through a connection member 7. The clampingportion 35 may fix the shaking absorption member 6 and clamp the shakingabsorption member 6. Therefore, the clamping portion 35 and the shakingabsorption member 6 may be detachably connected, instead of beingintegrally formed as one piece. In this way, the shaking absorptionmember 6 may be replaced easily when being worn out or damaged.

In some embodiments, the shaking absorption member 6 may define aconnection hole 61 for receiving the connection member 7. An end of theconnection member 7 may be connected to the inner wall of the shell 1,ensuring the connection member 7 to fix the shaking absorption member 6.

In some embodiments, the shaking absorption member 6 may be acylindrical elastic member, such that, the shaking absorption member 6may be stably clamped by the clamping portion 35. The connection member7 may be rod-shaped, such that the connection member 7 may easilyinserted into the shaking absorption member 6.

In some embodiments, the shaking absorption member 6 may be made ofsilicon. Rigidity and softness of the shaking absorption member 6 may beappropriate for reducing shaking, such that shaking absorption may beachieved.

In some embodiments, the clamping portion 35 may include a firstclamping arm 351 and a second clamping arm 352, and the first clampingarm 351 and the second clamping arm 352 may extend to gradually approachto each other. The first clamping arm 351 and the second clamping arm352 may be arranged on a surface of the inner shell 3. The firstclamping arm 351 and the second clamping arm 352 gradually approachingto each other may allow a clamping force to increase gradually, ensuringthe clamping portion 35 to fixedly clamp the shaking absorption member6, preventing the shaking absorption member 6 from falling off from theclamping portion 35.

In some embodiments, the end portion of the shell 1 may define thereceiving chamber 11 for receiving the inner shell 3. The receivingchamber 11 may be ellipsoid. A plurality of air inlets C1 may be definedin a radial face of the receiving chamber 11. Defining the plurality ofair inlets C1 in the radial face of the receiving chamber 11 may preventthe first inner air inlet K1 to from corresponding to the second innerair inlet K2. In this way, when the hair enters the air inlet C1, thehair may be prevented from entering the first inner air inlet K1 and thesecond inner air inlet K2 to further contact the fan assembly 2,preventing hair stranding. Therefore, user's safety may be ensured.

In some embodiments, the radial face of the receiving chamber 11 has anair inlet region. The air inlet C1 is defined in the air inlet region.The air inlet region includes a first air inlet region 115, a second airinlet region 116, a third air inlet region 117 and a fourth air inletregion 118. The first air inlet region 115 is located below a front sideof the receiving chamber 11. The second air inlet region 116 is locatedat the front side of the receiving chamber 11. The third air inletregion 117 is located at a lower side of the receiving chamber 11. Thefourth air inlet region 118 is located at an upper side of the receivingchamber 11. The above-mentioned plurality of air inlet regions cooperatewith each other to increase the amount of air intaking, increase theamount of air flowing, and improving the user's experience. Arrangingthe first air inlet region 115 and the second air inlet region 116 asdescribed in the above allows the air inlets to be far away from theuser, allowing generated noise to propagate away from the user, reducingthe wind noise. Positions at which the first air inlet region 115, thesecond air inlet region 116 and the third air inlet region 117 arearranged prevents the hair from being sucked into the fan blades of thefan assembly 2, such that hair stranding may be prevented, ensuring theuser's safety.

In some embodiments, the inner shell 3 may include a receiving portion36 and the wind guide portion 34 connected to the receiving portion 36.The receiving portion 36 is configured to receive the fan assembly 2.The receiving portion 36 defines an air inlet window for intaking theair. A structure of the air inlet window of the receiving portion 36 issimilar to that of the first inner air inlet K1 and the second inner airinlet K2 as described above and will not be repeated here. The windguide portion 34 may define the wind guide opening 341. The wind guideopening 341 extends and faces towards the air duct C3. The receivingportion 36 protects the fan assembly 2 from being affected by theexternal rain or dust. Further, if the hair enters from the air inletC1, the receiving portion 36 prevents the entered hair from furtherentering the inner shell 3 to be stranded by the fan assembly 2,ensuring the user's safety.

In some embodiments, the edge of the wind guide opening 341 may beturned outwardly to abut against the inner wall of the shell 1 to sealthe gap between the edge of the wind guide opening 341 and the innerwall of the shell 1. Details may be referred to the above embodiments,and will not be repeatedly described herein.

According to the present embodiment, the neck fan may include a shell, afan assembly and an inner shell. The shell is configured to hang aroundthe user's neck. The shell defines the air inlet, the air outlet and theair duct between the air inlet and the air outlet. The fan assembly isconfigured to drive the external air to flow through the air inlet andto guide the air to flow to the air outlet through the air duct. Theinner shell is arranged inside the shell, and the fan assembly isarranged inside the inner shell. An inner space of the inner shell iscommunicated to the air inlet and the air duct. The neck fan is able tointake the air from a large area and blow out the air to a large area.Further, hair stranding caused by the hair entering the shell may beprevented, ensuring the user's safety.

FIGS. 45-47 show a neck fan according to another embodiment of thepresent disclosure.

An arrow X in the figures indicate a front-rear direction. An arrow Y inthe figures indicate a horizontal direction, i.e., a left-rightdirection. An arrow Z in the figures indicate a vertical direction,i.e., an up-down direction.

As shown in FIGS. 45 and 46, the neck fan may include followingcomponents.

The shell 1 is configured to hand around the user's neck. The shell 1defines an air inlet 2 and an air outlet 3. The air inlet 2 is definedto allow the external air to flow into the neck fan. The air outlet 3 isdefined to allowing the air to flow out of the neck fan.

A fan assembly 4 is arranged to drive the external air to enter the neckfan through the air inlet 2 and to drive the air to flow out of the neckfan through the air outlet 3. The fan assembly 4 is arranged inside theshell 1. The shell 1 may protect the fan assembly 4.

A battery receiver 5 is configured to receive a battery 6. The batteryreceiver 5 is disposed outside the shell 1 and is independently of theshell 1. In this way, the battery 6 may be disposed out of the shell,and the battery 6 may not be placed inside the shell 1, such that thebattery 6 may be prevented from being blown by the air constantly.Constantly blowing the battery 6 may generate moisture for the battery6, which may seriously affect the service life of the battery 6.Further, the weight applied to the neck caused by the battery may bereduced, relieving a pressure on the neck. Further, the battery receiver5 protects the battery 6 from the external dust or rain, and the battery6 may be replaced more easily, i.e., the battery 6 may be replaced byopening a cover 51 of the battery receiver 5, a replacement operationmay be simple.

In some embodiments, the shell 1 may be curved to fit a shape of theuser's neck, such that the shell may fit firmly with the user's neck,preventing the fan from shaking while being worn, such that the airflowing may be not affected. The fan assembly 4 is arranged in each oftwo end portions of the shell 1. In this way, weights of the two ends ofthe shell 1 may be increased. A certain downward traction for the neckfan may be generated at a front of the user when the neck fan is beingworn, allowing the neck fan to fit firmly on the neck.

In some embodiments, as shown in FIGS. 46 and 47, the shell 1 mayinclude a left head portion 11, a right head portion 12 and a connectionportion 13. Two ends of the connection portion 13 may be connected tothe left head portion 11 and the right head portion 12 respectively. Inthis way, the shell 1 may be easily assembled and disassembled.

In some embodiments, the connection portion 13 is a tubular structurehaving a plurality of tubes sleeving each other. That is, the connectionportion 13 comprises a first connection portion 131 and a secondconnection portion 132. The first connection portion 131 is partiallyembedded in the second connection portion 132. An overall length of theconnection portion 13 may be adjusted (extended or retracted) byadjusting a length of the first connection portion 131 embedded into thesecond connection portion 132. In this way, the connection part 13connects to the left head portion 11 and the right head portion 12. Thelength of the connection portion 13 is adjusted based on a size of theneck, such that an overall length of the shell 1 is adjusted to suitvarious neck sizes of various users.

In some embodiments, the left head portion 11, the right head portion 12and the connection portion 13 may be made of soft material. In this way,a size of the shell 1 may be adjusted based on the size of the user'sneck, and the shell 1 may be adapted to various neck sizes.

In some embodiments, an upper face of the left head 11 portion and/orthe right head portion 12 that defines the air outlet 3 is inclined at apredetermined angle towards an inner side, which is curved and arced,such that an area of the user that can be covered by the air flowing outof the neck fan may be increased.

In some embodiments, the predetermined angle may be in a range of 5° to30° with respect to the vertical direction.

In some embodiments, the predetermined angle may be 10°, 15°, 20° or25°. In detail, when the predetermined angle is 10°, an area covered bythe air flowing out of a side of the neck fan may be maximum, but a windforce may be minimum. When the predetermined angle is 15°, the areacovered by the air flowing out of the side of the neck fan may be asecond maximum, and the wind force may be a second minimum. When thepredetermined angle is 20°, the area covered by the air flowing out ofthe side of the neck fan may be relatively small, and the wind force maybe relatively large. When the predetermined angle is 25°, the area maybe straightforwardly covered by the air flowing out of the side of theneck fan, and the wind force may be maximum. The predetermined angle maybe adjusted to generate various wind blowing experiences, situationsthat require various amounts of air flowing and cooling effects may beadapted.

In some embodiments, the left head portion 11 and the right head portion12 may be structurally symmetrical. In the present embodiment, only theleft head portion 11 may be described. The left head portion 11 mayinclude an inner side shell 111 and an outer side shell 112 engaged withthe inner side shell 111. The fan assembly 4 may be disposed between anend portion of the inner side shell 111 and an end portion of the outerside shell 112. An inner side cover 113 may be arranged on an inner faceof the inner side shell 111. The air inlet 2 may be defined in the innerside cover 113. The air inlet 2 may be circular. An outer side cover 114may be arranged on an outer face of the outer side shell 112. The innerside cover 113 and the outer side cover 114 may be arranged forprotection. Further, a through hole may be defined in each of the innerside cover 113 and the outer side cover 114 for dissipating heat,increasing air circulation, and ensuring heat generated when the fanassembly 4 is operating to be dissipated out of the neck fan.

In some embodiments, at least two turbine fans may be arranged in theleft head portion 11 and/or the right head portion 12. Each of the atleast two turbine fans may intake the air from two opposite sides of thefan. Further, each of the two opposite side of each turbine fan in theshell 1 for intaking the air may correspond to a corresponding airinlet, such that the amount of air intake may be increased.

In some embodiments, a position of the outer side shell 112corresponding to the fan assembly 4 may define an auxiliary air inlet1121. On one hand, the auxiliary air inlet 1121 may correspond to theair inlet 2 in the inner side cover 113, allowing the air to enter theneck fan from two opposite sides, preventing wind stifling and windnoise generated by intaking the air from only one side, and ensuring thefan assembly to intake a sufficient amount of the air. On the otherhand, the heat generated by the fan assembly 4 may be dissipated fromthe auxiliary air inlet 1121, and a weight of the entire structure maybe reduced.

In some embodiments, the air inlet 2 may be defined in two end portionsof the shell 1 and may correspond to the fan assembly 4. In one case,when the neck fan is hanging around the user's neck, the end portions ofthe shell 1 may not attach the user's skin or clothes. Morespecifically, an inner face of the end portions and an outer face of theend portions do not attach to the user's skin. A middle portion orportions near the middle portion of the shell 1 may attach to the user'sskin or clothes. Therefore, defining the air inlet 2 in the end portionsof the shell 1 allows the air to enter the shell 1 fluently. A casewhere the air inlet 2 is blocked by the user's skin or clothes,preventing the air from flowing through the air inlet 2, may beprevented. Further, a position of the air inlet 2 corresponding to aposition of the fan assembly 4 minimizes a distance that the air flowsfrom the air inlet 2 to the fan assembly 4, such that the fan assembly 4may generate the wind in real time. The air outlet 3 may be defined inan inner face or an upper face of the shell 1. In one case, when theneck fan is hanging around the user's neck, the inner face of the shell1 may attach to the user's skin to allow the skin to be covered by thewind optimally. Therefore, the air outlet 3 is defined in the inner faceof the shell 1. Defining the air outlet 3 in the upper face of the shell1 allows the air out of the neck fan may flow along the user's neck toreach the user's head, due to the air flowing, areas of the user's neckand the user's head covered by the wind may be maximized.

In some embodiments, the fan assembly 4 may include a fan impeller, amotor for driving the fan impeller to rotate, and a control board forcontrolling a rotating speed of the motor. The control board may beconnected to the motor. The amount of the air flowing out of the neckfan can by adjusted by adjusting the rotating speed of the motor.

In some embodiments, the fan impeller may include fan blades 41 and arotating wheel 42. The fan blades 41 may be arranged around a wheel faceof the rotating wheel 42. A gap may be defined between the fan blades 41and the inner wall of the shell 1. The gap may be in a range of 2 mm to5 mm. Defining the gap may reduce a distance between the fan blades 41and the inner wall of the shell 1, such that wind stifling may beprevented, and the wind noise may be reduced. Further, the gap may notbe excessively small, such that when the neck fan is shaken, frictionmay be prevented between the fan blades 41 and the inner wall of theshell 1, and a structural damage may be prevented.

In some embodiments, as shown in FIGS. 46 and 47, the inner wall of theshell 1 may extend to form a wind guide plate 14. The wind guide plate14 may extend along an outer circumference surface of the fan bladestowards an inner middle of the shell 1. The wind guide plate 14separates the fan assembly 4 and the air duct from the control board.The air duct refers to a gap between components inside the shell 1 forthe air to flow through. In this way, the air and/or the water flowingin the air duct may not erode the control board. The wind guide plate 14may guide the wind generated by the fan assembly 4 and guide the air toflow from the end portion of the shell 1 to the middle of the shell 1,allowing the entire space inside the shell 1 to be covered by the wind.In this way, the air may flow out through various air outlets 3,allowing the space covered by the air flowing out of the neck fan to bemaximized.

In some embodiments, the plurality of air outlets 3 may be spaced apartfrom each other and arranged along the extending direction of the windguide plate 14. In this way, the air outlets 3 may optimally cover aroute along which the wind guide plate 14 extends, such that the windmay be blown out of the shell 1 uniformly from various air outlets, andan air blowing effect may be increased.

In some embodiments, as shown in FIGS. 46 and 47, two fan impellers maybe arranged at each of two end portions of the shell 1. One of the twoimpellers near the end portion of the shell 1 may be surrounded by thewind guide plate 14, and the wind guide portion 14 extends upwardly toreach the inner wall of the shell 1, such that a first air duct may bedefined. The other one of the two impellers away from the end portion ofthe shell 1 may be partially surrounded by the wind guide portion 14,and the wind guide plate 14 extends towards the middle portion of theshell 1, such that a second air duct may be defined. The first air ductdoes not communicate with the second air duct. In this way, windgenerated by one of the two impellers and wind generated by the otherone of the two impellers may not compressed with each other, such thatwind stifling may be prevented, and the wind noise may be prevented. Indetail, the air in the first air duct may flow out of the shell 1 fromthe air outlet 3 in the end portion of the shell 1, and the air in thesecond air duct may flow out of the shell 1 from the air outlets 3 inother portions of the shell 1. In this way, the air in the first air andthe air in the second air duct may not be communicated or compressedwith each other, such that the wind noise may be reduced.

In some embodiments, the battery receiver 5 may be connected a first endof a wire 7. A second end of the wire 7 may be inserted into the shell 1and connected to the control board. That is, the battery receiver 5 andthe shell 1 may be detachably connected with each other via the wire 7,such that the neck fan may be more portable.

In some embodiments, a position of the second end of the wire 7 thatconnects the shell 1 may be near the end portion of the shell 1. In thisway, a traction force generated by the battery receiver 5 is applied tothe end portion of the shell 1. When the neck fan is worn to the user'sneck, the gravitational center of the neck fan may be moved to a frontof the neck fan, allowing the shell 1 to attach to the user's neck moreproperly. When the user is moving, the neck fan may not move backwards,such that the shell 1 may not depart away from the user's neck. That is,the neck fan may be attached to the user's neck more stably.

In some embodiments, an end of the wire 7 may be rotatably connected tothe battery receiver 5. That is, a position at which the batteryreceiver 5 is disposed may be adjusted by rotating. A fixing portion maybe arranged on a side of the battery receiver 5 to fixedly clamp thebattery receiver 5. In detail, the fixing portion may be an adhesivelayer arranged on a surface of the battery receiver 5, enabling thebattery receiver 5 to b adhesively fixed to clothes of the user. Thefixing portion may alternatively be a clamping plate arranged on thesurface of the battery receiver 5, enabling the battery receiver 5 toclamp the clothes of the user, such that the battery receiver 5 may befixed.

According to the present embodiment, the neck fan may include a shell, afan assembly, and a battery receiver. The shell may define the air inletand the air outlet. The fan assembly may be configured to drive theexternal air to enter the neck fan through the air inlet, and drive theair to flow out of the neck fan through the air outlet. The fan assemblymay be arranged inside the shell. The battery receiver may be configuredto receive the battery. The battery receiver may be disposed out of theshell, and may be independent from the shell 1. In this way, the neckfan may blow the wind towards the user's neck, and the battery of theneck fan may not be affected by the wind.

FIGS. 48-52 show a neck fan according to another embodiment of thepresent disclosure.

FIG. 48 is a schematic view of a neck fan according to an embodiment ofthe present disclosure, and FIG. 49 is a schematic view of the neck fanshown in FIG. 48 from another view angle. The neck fan 1 may include ashell 10, a fan assembly 20 and an outlet adjustment assembly 30.

FIG. 50 is an exploded view of the neck fan shown in FIG. 48, FIG. 51 isa schematic view of a portion of the neck fan shown in FIG. 48, and FIG.52 is a schematic view of an outlet adjustment assembly of the neck fanshown in FIG. 48. The shell 10 may extend along a predetermineddirection and define a receiving chamber 11, an air inlet 12, an airoutlet 13. The receiving chamber 11 extends along a predetermineddirection. The air inlet 12 may communicate with the receiving chamber11. The air outlet 13 may communicate with the receiving chamber 11. Thefan assembly 20 may be received in the receiving chamber 11, andconfigured to guide the air from the air inlet 12 to flow to the airoutlet 13. The outlet adjustment assembly 30 may include an outletadjustment plate 31 and a driving assembly 32. The outlet adjustmentplate 31 may be disposed near the air outlet 13 and may be movablyconnected to the shell 10. The driving assembly 32 may be received inthe receiving chamber 11 and may be connected to the outlet adjustmentplate 31. When the user is wearing the neck fan 1, and when the userneeds to adjust an air outlet angle of the neck fan 1, a remote control,a switch, and the like may be taken to control the driving assembly 32to operate, and the driving assembly 32 may drive the outlet adjustmentplate 31 to move relative to the shell 10 to change an angle between theoutlet adjustment plate 31 and the shell 10. In this way, the air outletangle out of the air outlet 13 may be adjusted, and the amount of airout of the air outlet 13 may be adjusted.

In the neck fan 1 of the present embodiment, the outlet adjustment plate31 near the air outlet 13 and movably connected to the shell 10 may bedriven by the control assembly 32 to move relative to the shell 10 toadjust the air flowing out of the air outlet 13. In this way, whileusing the neck fan, the air flowing out of the fan may be adjusted,meeting various requirements of the user. Further, the driving assembly32 is taken to adjust the outlet adjustment plate 31, and therefore, theair outlet may be adjusted accurately without manual operations. Theneck fan may be used conveniently, improving the user's experience. Inaddition, the fan assembly 20 may be received in the receiving chamber11, and the air at the air inlet 12 may be guided to the air outlet 13.In this way, the hair and other foreign matter may not wind around thefan assembly 20, the neck fan may be used safely and conveniently.Further, the wind noise may be reduced, the loss in the air flowing maybe reduced, and the air flowing efficiency of the neck fan 1 maybeimproved.

Further, the outlet adjustment plate 31 may include at least two plateportions 311 spaced apart from each other and a connection portionconnected to the at least two plate portions. The at least two plateportions 311 may be received in the air outlet 13 to divide the airoutlet 13 into at least two sub-outlets. The number of the plateportions 311 may be determined appropriately based on a size of airoutlet 13. In the present embodiment, three plate portions 311 may bearranged. The connection portion 312 may include a first connectionportion 312 a and a second connection portion 312 b. The shell 10 mayinclude a third connection portion 14 a near the air outlet 13. Thethird connection portion 14 a may be movably connected to the firstconnection portion 312 a. the second connection portion 312 b may beconnected to the driving assembly 32. Arranging at least two plateportions 311 spaced apart from each other and disposing the at least twoplate portions 311 in the air outlet 13 to divide the air outlet 13 intothe at least two sub-outlets, allows the air to flow out of the neck fan1 more uniformly, and enables an air out flowing direction from the airoutlet 13 to be adjusted. In addition, the third connection portion 14 aof the shell 10 may be movably connected to the first connection portion312 a of the outlet adjustment plate 31. The second connection portion312 b of the outlet adjustment plate 31 may be connected to the drivingassembly 32. In this way, the driving assembly 32 may drive the plateportions 311 through the second connection portion 312 b, such that theair out flowing direction of the air outlet 13 may be adjusted. Further,the movable connection between the third connection portion 14 a and thefirst connection portion 312 a allows the outlet adjustment plate 31 tobe stably connected to the shell 10, ensuring the neck fan 1 to bestable and safe while the air out flowing direction is being adjusted.

In detail, the third connection portion may be rotatably connected tothe first connection portion 312 a. One of the third connection portion14 a and the first connection portion 312 a may include a pivot, and theother one of the third connection portion 14 a and the first connectionportion 312 may define a pivot hole. In the present embodiment, thefirst connection portion 312 a includes the pivot, and the thirdconnection portion 14 a defines the pivot hole. The pivot is at leastpartially received in the pivot hole to achieve rotation connectionbetween the third connection portion 14 a and the first connectionportion 312 a. Since one of the third connection portion 14 a and thefirst connection portion 312 a includes the pivot, and the other one ofthe third connection portion 14 a and the first connection portion 312defines the pivot hole, the pivot is at least partially received in thepivot hole to achieve rotation connection between the third connectionportion 14 a and the first connection portion 312 a, the structuralconnection may be simple, and the connection may be reliable.

Further, the driving assembly 32 may include a driving member 321, afirst transition member 322, and a second transition member 323. Thefirst transition member 322 may be connected to the driving member 321.The second transition member 323 may be connected between the firsttransition member 322 and the second connection portion 312 b. Thedriving member 321 may include a driving body 321 a and a driving shaft321 b connected to the first driving body 321 a. The first transitionmember 322 may include a first cone gear 322 a. The first cone gear 322a may sleeve on the driving shaft 321 b. The second transition member323 may include a second cone gear 323 a engaged with the first conegear 322 a, a transition shaft 323 b connected to the second cone gear323 a, and a transition portion 323 c connected between the transitionshaft 323 b and the second connection portion 312 b. The driving body321 a drives the driving shaft 321 b to rotate, such that the first conegear 322 a rotates. Further, the engagement drives the second cone gear323 a that engages with the cone gear 322 a to rotate, such that theoutlet adjustment plate 31 may be driven to rotate to adjust the air outflowing direction, the structure may be simple and reliable.

In detail, an extending direction of the driving shaft 321 b may beperpendicular to an extending direction of the transition shaft 323 b.the transition portion 323 c may include a circular plate 323 d. thetransition shaft 323 b may be eccentrically connected to a plate surfaceof the circular plate 323 d away from the second connection portion 312b. When the driving body 321 a drives the driving shaft 321 b to rotateto drive the transition shaft 323 b to rotate, since the transitionshaft 323 b is eccentrically connected to the circular plate 323 d, thesecond transition member 323 may drive the outlet adjustment plate 31 torotate around the pivot shaft while the outlet adjustment plate 31 isswinging to the left and to the right. In this way, an adjustment rangeof the air out flowing direction may be increased. The second connectionportion 312 b may include a first portion 312 c connected to the plateportions 311 and a second portion 312 d connected to the first portion312 c. A cross section of the second portion 312 d may be U shaped, andthe second portion 312 d may define a receiving space. That is, thesecond portion 312 d defines a U-shaped receiving space. The opening ofthe receiving space of the second portion 312 d may face the transitionportion 323 c. The transition portion 323 c may be received in theU-shaped receiving space. The shell 10 may further include a fourthconnection portion 14 b. The fourth connection portion 14 b may beconnected to a body of the shell 10 and may be disposed between thethird connection portion 14 a and the second cone gear 323 a. The fourthconnection portion 14 b may define a guide hole 141. The transitionshaft 323 b may extend through the guide hole 141 and may be movable inthe guide hole. The guide hole 141 may be a strip-shaped hole and maycommunicate with an external of the neck fan. Arranging the transitionshaft 323 b to be eccentrically connected to the plate face of thecircular plate 323 d away from the second connection portion 312 bincreases the adjustment range of the air out flowing direction.Further, the transition portion 323 c is received in the U-shapedreceiving space, such that the transition portion 323 c may be stablyconnected to the second connection portion 312 b while rotating, and thetransition portion 323 c may not be detached easily. In addition,arranging the fourth connection portion 14 b, defining the guide hole141 in the fourth connection portion 14 b, and defining the guide hole141 to be strip-shaped and communicating with the external, allows thesecond transition member 323 to be assembled easily, and a position ofthe second transition member 323 may be limited and supported stably.

Further, the shell 10 may include a first shell 15 a arranged near aside of the user's neck and a second shell 15 b arranged near anotherside of the user's neck. The receiving chamber 11 may include a firstsub-chamber 111 defined in the first shell 15 a and a second sub-chamber112 defined in the second shell 15 b. The air inlet 12 may include afirst air inlet 12 defined in the first shell 15 a and a second airinlet 12 defined in the second shell 15 b. The air outlet 13 may includea first air outlet 131 defined in the first shell 15 a and a second airoutlet 132 defined in the second shell 15 b. Two fan assemblies 20 maybe arranged, and two outlet adjustment assemblies 30 may be arranged.One of the two fan assemblies 20 may be received in the firstsub-chamber 111, and configured to guide the air from the first airinlet 12 to flow to the first air outlet 131. The other one of the twofan assemblies 20 may be received in the second sub-chamber 112, andconfigured to guide the air from the second air inlet 12 to flow to thesecond air outlet 132. One of the two outlet adjustment assemblies 30may be received in the first sub-chamber 111 and configured to adjustthe air flowing out through the first air outlet 131. The other one ofthe two outlet adjustment assemblies 30 may be received in the secondsub-chamber 112 and configured to adjust the air flowing out through thesecond air outlet 132. In the present embodiment, the two fan assemblies20 may be received in the first sub-chamber 111 of the first shell 15 aand the second sub-chamber 112 of the second shell 15 b respectively. Inthis way, the air may flow out of the neck fan from two opposite sidesof the user's neck at the same time, cooling the user quickly. Since thefirst shell 15 a and the second shell 15 b are arranged, and each of thefirst shell 15 a and the second shell 15 b corresponds to one fanassembly 20, an air flowing efficiency out of the neck fan 1 may beincreased. Further, the two fan assemblies 20 are received in the firstsub-chamber 111 and the second sub-chamber 112 respectively, the airflowing caused by the two fan assemblies may not interfere each other,the air flowing efficiency out of the neck fan 1 may further beincreased.

Further, the shell 10 may further include a connection assembly 16connected between the first shell 15 a and the second shell 15 b. Theconnection assembly 16 may include a connection shell 161, a firstconnection member 162 and a second connection member 163. The connectionshell 161 may be a curved hollow tube. An end of the first connectionmember 162 may be connected to and arranged inside an end of theconnection shell 161, and the other end of the first connection member162 may be connected to and arranged inside an end of the first shell 15a. An end of the second connection member 163 may be connected to andarranged in the other end of the connection shell 161, and the other endof the second connection member 163 may be connected to and arrangedinside the other end of the second shell 15 b. In the presentembodiment, the connection assembly 16 is configured to connect thefirst shell 15 a to the second shell 15 b, such that the neck fan 1 mayhang around the user's neck, the structure of the neck fan may besimple, the neck fan may be easily manufactured, and may be easilyassembled.

Further, the fan assembly 20 may include turbine blades 21. The fanassembly 20 in each of the first sub-chamber 111 and the secondsub-chamber 112 may include at least two turbine blades. The at leasttwo turbine blades 21 may be arranged along a predetermined direction.An air flowing direction generated by the turbine fans may beperpendicular to an extending direction of the rotation shaft of thefan. In this way, an increased air volume may be generated while areduced space may be occupied, such that the amount of air flowing outof the neck fan 1 may be increased, the user may be cooled quickly. Theneck fan 1 may further include an electric control assembly 40, receivedin one of the first sub-chamber 111 and the second sub-chamber 112. Theelectric control assembly 40 may include a battery 41, a circuit board42, and a control switch 43. The circuit board 42 may be electricallyconnected to the battery 41 and the control switch 43. The neck fan 1may be supplied with power by the battery 41. The user may carry anduser the neck fan at anytime and anywhere. In the present embodiment,the fan assembly 20 includes the turbine blades 21, the fan assembly 20in each of the first sub-chamber 111 and the second sub-chamber 112includes at least two turbine blades, and the at least two turbineblades 21 are arranged along the predetermined direction, such that theair flowing efficiency of the neck fan 1 may be improved effectively.

Further, the shell 10 may include an inner plate 17 near the user'sneck, an outer plate 17 b opposite to the inner plate 17 a, a firstconnection plate 18 a, a second connection plate 18 b, and an end plate18 c. The first connection plate 18 a may be connected to a side of theinner plate 17 a and a side of the outer plate 17 b, and may be arrangednear the user's face. The second connection plate 18 b may be connectedto another side of the inner plate 17 a and another side of the outerplate 17 b. The end plate 18 c may be connected to the inner plate 17 a,the outer plate 17 b, the first connection plate 18 a and the secondconnection plate 18 b. The air inlet 12 may be defined in at least oneof the inner plate 17 a and the outer plate 17 b. The air outlet 13 maybe defined in the first connection plate 18 a. The first connectionplate 18 a may define a plurality of air outlets 18 a communicating withthe receiving chamber 11. Sizes of the plurality of air outlets 181 maybe gradually decreased along a direction away from the air outlet 13. Inthe present embodiment, each of the inner plate 17 a and the outer plate17 b defines the air inlet 12, such that the amount of air flowing intothe neck fan 1 may be increased, an air intaking efficiency of the neckfan 1 may be increased. The plurality of air outlets 181, which aredefined in the first connection plate 18 a and communicating with thereceiving chamber 11, may be arranged around an outer periphery of theuser's neck. In this way, the plurality of air outlets 181 and the airoutlet 13 may cooperatively allow the air to flow out of the neck fan,enabling the user to feel comfortable. The driving assembly 32 isdisposed between the end plate 18 c and the fan assembly 20. The shell10 may further include a first partition plate 19 a and a secondpartition plate 19 b. The first partition plate 19 a is arranged tosurround an outer side of the fan assembly 20. The second partitionplate 19 b may be connected to the first partition plate 19 a and extendtowards a side away from the end plate 18 c. The second partition plate19 b and the first connection plate 18 a may define an air duct 19 ccommunicating with the air outlets 181, such that the fan assembly 20may drive the air from the air inlet 12 to flow along the air duct 19 cto the air outlets 181. In the present embodiment, the air inlet isdefined in at least one of the inner plate 17 a and the outer plate 17b, and the air outlet 13 is defined in the first connection plate 18 a.In this way, the air inlet and the air outlet may not be communicatedand interfere with each other. The plurality of air outlets 181 aredefined in the first connection plate 18 a and communicating with thereceiving chamber 11, such that the amount of air flowing out of theneck fan 1 may be increased, increasing the air flowing efficiency outof the neck fan. The second partition plate 19 b and the firstconnection plate 18 a define the air duct 19 c communicating with theair outlets 181, such that the fan assembly 20 may drive the air fromthe air inlet 12 to flow along the air duct 19 c to the air outlets 181.In this way, the loss of the wind of the fan assembly 20 while flowingin the receiving chamber 11 may be reduced, further increasing the airflowing efficiency out of the neck fan.

Further, the shell 10 may further include an air inlet cover 17 c. Aposition at which the air inlet cover 17 c is arranged may correspond tothe air inlet 12. Further, an inlet gap 17 d may be defined between theair inlet cover 17 c and an outer surface of the shell 10 and maycommunicate with the air inlet 12. In this way, the air out of the neckfan 1 may enter the receiving chamber 11 by flowing through the inletgap 17 d and the air inlet 12. Each of the inner plate 17 a and theouter plate 17 b may define the air inlet 12. The air inlet cover 17 cmay include a first inlet cover 171 and a second inlet cover 172. Thefirst inlet cover 171 may be arranged on a side of the outer plate 17 baway from the inner plate 17 a. The second inlet cover 172 may bearranged on a side of the inner plate 17 a away from the outer plate 17b. The inlet gap 17 d may be defined between the first inlet cover 171and the outer surface of the outer plate 17 b, and may communicate withair inlet 12 of the outer plate 17 b. In this way, the air out of theneck fan 1 may enter the receiving chamber 11 through the inlet gap 17 dand the air inlet 12 of the outer plate 17 b. The second inlet cover 172may define a plurality of air inlets 17 e corresponding to the air inlet12 of the inner plate 17 a, such that the air out of the neck fan 1 mayenter the receiving chamber 11 through the air inlets 17 e and the airinlet 12 of the inner plate 17 a. It shall be understood that, the inletgap 17 d may compress the air flowing into the neck fan and allow an airpressure near the air inlet 12 to be greater than an air pressure in thereceiving chamber 11. In this way, a negative pressure is generated topush the air out of the neck fan 1 towards the air inlet 12, increasingan air flowing speed, maximizing an air intaking efficiency of the neckfan 1. Further, the efficiency of the air flowing out of the neck fan 1may be increased, and the user may be cooled quickly. By arranging theair inlet cover 17 c, the hair or the foreign matters may not wind tothe fan assembly easily, allowing the neck fan to be used safely andconveniently, and reducing the wind noise.

FIGS. 53-57 show a neck fan according to an embodiment of the presentdisclosure.

An arrow X in the figures indicate a front-rear direction, i.e., a frontside-rear side direction. An arrow Y in the figures indicate ahorizontal direction, i.e., a left-right direction. An arrow Z in thefigures indicate a vertical direction, i.e., an up-down direction.

As shown in FIGS. 53-55, the neck fan may include a shell 1, a fanassembly 2, and a wind guide member 3. The shell 1 may be configured tohang around the user's neck. The shell 1 may define an air inlet 11, anair outlet 12, and an air duct defined in the shell 1. The air duct maycommunicate with the air inlet 11 and the air outlet 12. The fanassembly 2 may be arranged inside the shell 1 and configured to guidethe external into the neck fan through the air inlet 11, and drive theair to flow along the air duct to the air outlet 12. The wind guidemember 3 may be detachably received in the air duct and configured toguide and separate the air flowing in the air duct. The wind guidemember 3 may extend from the fan assembly 2 towards the air duct. Thewind guide member 3 may divide the air duct, such that the air may flowalong predetermined tracks, and the air may be collectively transportedto the divided air duct. In this way, the air may flow to approach theair outlet 12, allowing the air flowing out of the neck fan moreuniformly. Further, the speed of the air flowing out of the neck fan maybe increased, improving the user's experience. Further, the wind guidemember 3 is detachably received in the air duct, the wind guide membermay be assembled and detached quickly, and may be easily replaced in thefuture.

In some embodiments, the wind guide member 3 may be a curved windseparation plate. A first end 31 of the wind separation plate may becurved and bent and may be disposed near the fan assembly 2. A plateface 32 of the wind separation plate may correspond to the air outlet12. The plate face 32 of the wind separation plate may separate the airduct to define a first air chamber Q1 and a second air chamber Q2. Thefirst air chamber Q1 may communicate with the air outlet 12. In detail,the first air chamber Q1 is defined above the wind separation plate, andthe second air chamber Q2 is defined below the wind separation plate.That is, the first air chamber Q1 may be above the second air chamberQ2. The first air chamber Q1 is defined to allow the air to flow along,enabling the air to flow to the air outlet 12. The second air chamber Q2is defined to receive an electronic element, such as a battery C1, acircuit board of the neck fan, and so on.

In some embodiments, a cross section area of the first air chamber Q1may be gradually decreased along a direction away from the fan assembly2. In this way, a cross section area of the air duct away from the fanassembly 2 may be decreased gradually, compressing the air in the airduct, such that an air flowing speed may be increased, and an amount ofair flowing out of the neck fan may be increased. In this way, theamount of air flowing out of the neck fan at a position away from thefan assembly 2 may be the same as the amount of air flowing out of theneck fan at a position near the fan assembly 2. The user may feel thatthe amount of air flowing out of the neck fan through various airoutlets are uniform, improving the user's experience.

In some embodiments, a curved and bent contour of the first end 31 ofthe wind separation plate may fit with a contour of an outercircumference of the fan assembly 2. In this way, the wind generatedfrom the fan assembly 2 may flow by touching the plate face 32 of thewind separation plate, reducing a resistance against the air flowing,optimally maintaining the air flowing speed.

In some embodiments, as shown in FIGS. 56 and 57, at least one windequalizing plate 321 may extend out from the plate face 32 of the windseparation plate and may face the air outlet 12. The wind equalizingplate 321 may define a through hole 3211 to allow the air to flowthrough. The wind equalizing plate 321 allows the air in the first airchamber Q1 to flow out of the air outlet 12 uniformly. In someembodiments, after the wind is generated by the fan blades 21 of the fanassembly, most of the air may flow along the wind separation platetowards the air duct, but may not saturate to flow upwardly towards theair outlet 12. Arranging the wind equalizing plate 321 may facilitatethe air flowing directions to be changed, such that the air flowingthrough each air outlet 12 may be uniform, and each air outlet 12 may besaturated by the air. Further, the rest of the air that does not flowout through the air outlet 12 may continue flowing along the windseparation plate deeply to the air duct.

In some embodiments, the wind equalizing plate 321 may be curved. Atangent of a curved face of the wind equalizing plate 321 may beobtained. An angle between the tangent and the plate face of the windseparation plate may be in a range of 30° to 90°. In this way, when theair contacts the wind equalizing plate 321, the resistance against theair flowing along the wind equalizing plate 321 to the air outlet 12 maybe relatively small. Therefore, the air flowing speed may be maintainedoptimally, and the resistance against the wind may be reduced.

In some embodiments, the shell 1 may include a first end head portionT1, a second end head portion T2, and a middle connection portion T3.The middle connection portion T3 may be connected between the first endhead portion T1 and the second end head portion T2. At least one fanassembly 2 may be arranged inside at least one of the first end headportion T1 and/or the second end head portion T2. An auxiliary windseparation plate Z1 may be arranged inside the middle connection portionT3. An end portion of the auxiliary wind separation plate Z1 may alignto an end portion of the wind separation plate in the first end headportion T1 and/or the second end head portion T2. In this way, the airduct in each of the first end head portion T1, the second end headportion T2, and the middle connection portion T3 is divided. Further,when the air in the first air chamber Q1 of the first end head portionT1 and/or the second end head portion T2 flows to the middle connectionportion T3, the air may also flow along the auxiliary wind separationplate Z1 to further reach the middle portion of the shell 1. Therefore,in the present embodiment, the air in the entire may flow through theair ducts defined in the entire shell 1 to reach the air outlet 12 toexit the neck fan, further enabling the air flowing out of variousoutlets to be uniform, improving the user's experience.

In some embodiments, the fan assembly 2 may include fan blades 21 and amotor driving the fan blades 21 to rotate. The air inlet 11 may bedefined a side face of the first end head portion T1 and the second endhead portion T2. A position in which the air inlet 11 is defined maycorrespond to a position at which the fan assembly 2 is arranged. Theair outlet 12 is defined in an inner surface and/or an upper surface ofthe shell 1, such that the wind may be blown towards the user's neck.When the air outlet 12 is defined in the upper surface of the shell 1,the air may be blown out of the neck fan straightforwardly, and the airmay flow upwards along the user's neck, such that the user's face, rearof the user's ears, and the user's head may be blown by the air. An areacovered by the air may be increased, improving the user's experience.

In some embodiments, the wind guide member 3 may be inserted or embeddedinto the inner wall of the shell 1, such that the wind guide member 3may be assembled and detached easily.

In some embodiments, the wind guide member may be arranged in aprotrusion 33 protruding side-ward. The inner wall of the shell 1 maydefine a slot 13 for receiving the side-ward protrusion 33.

According to the present embodiment, the neck fan may include the shell,the fan assembly, and the wind guide member. The shell may be configuredto hang around the user's neck. The shell may define the air inlet, theair outlet, and the air duct defined in the shell. The air duct maycommunicate with the air inlet and the air outlet. The fan assembly maybe arranged inside the shell and configured to drive the external air toflow through the air inlet, and drive the air to flow along the air ductto reach the air outlet. The wind guide member may be detachablyreceived in the air duct and configured to separate and guide the air inthe air duct. The wind guide member may extend from the fan assemblytowards the air duct. The neck fan of the present embodiment may dividethe air duct, allowing the air to uniformly flow out of various airoutlets. Further, the wind guide member may be easily assembled anddetached.

FIGS. 58-66 show a neck fan according to some embodiments of the presentdisclosure.

An arrow X in the figures indicate a front-rear direction. An arrow Y inthe figures indicate a left-right direction. An arrow Z in the figuresindicate an up-down direction.

As shown in FIGS. 58-60, the neck fan 100, according to a firstembodiment of the present disclosure, may include a shell 1. The shell 1may include two first portions 11 and a second portion 12 connected tothe two first portions 11. The two first portions 11 may besymmetrically disposed at two opposite sides of the second portion 12.The shell 1 (in other words, one of the two first portions 11) may bearranged with a first air inlet portion A1 and a first air outletportion C1 and may define a receiving chamber R1 and an air duct D1. Theneck fan 100 may further include a fan assembly 2. The fan assembly 2may be received in the receiving chamber R1. The fan assembly 2 may beconfigured to drive the external air to flow through the first air inletportion A1, further flow along the receiving chamber R1 and the air ductD1, and to flow out of the neck fan through the first air outlet portionC1. The fan assembly 2 may include a fan 21 and a motor driving the fan21 to rotate. The motor may drive the fan 21 to rotate around a rotationshaft. A central axis of the rotation shaft X1 may be perpendicular toan orthographic projection of the first air inlet portion A1. When theneck fan 100 is worn to the user, the second portion 12 may correspondto the back the user's neck. The two first portions 11 may correspond toa left neck and a right neck respectively and correspond to a front ofthe user's chest. The two first portions 11 may extend from the secondportion 12, extending upwardly and front-wardly, and further extendingdownwardly towards the user's chest. Along extending directions of thetwo first portions 11, the two first portions 11 may partiallycorrespond to the user's shoulders. Further, along a gravitationaldirection, a wider face of the first portion 11 and a wide face of thesecond portion 12 contact the user. In this way, neck fan 100 may lay onthe user's shoulders, which may be ergonomically friendly, allowing theuser to be more comfortable when wearing the neck fan. It shall beunderstood that, shapes of the first portion 11 and the second portion12 may not be limited by the above embodiments, as long as the neck fan100 may be worn to around the user's neck. In other embodiments, onefirst portion 11 may be used independently. One first portion 11 mayserve as a hand-held fan, a clamping fan, a fan worn to other portionsof the user (such as a wrist).

As shown in FIGS. 59-61, the fan 21 may have a second air inlet portion22 and a second air outlet portion 23. The air may flow past the firstair inlet portion A1, the second air inlet portion 22, the second airoutlet portion 23, and the air duct D1, and the air may flow out of theneck fan through the first air outlet portion C1. At least a portion ofthe second air inlet portion 22 may extend through the fan 21. Thecentral axis X1 of the rotation shaft may be perpendicular to theorthographic projection of the second air inlet portion 22. The air mayflow to leave the second air outlet portion 23 along a first directionF1 (indicated by the arrow shown in FIG. 63). The first direction F1 maybe perpendicular to the central axis X1 of the rotation shaft. In otherwords, the motor drives the fan to rotate, generating a rotation plane.The first portion 11 may include a first wall defining the air outletand a second wall defining the air inlet. The first wall and the secondwall may be arranged on a same side of the rotation plane.

In the present embodiment, the fan 21 may be a turbine fan. The turbinefan may occupy a relatively small space but generate a proper amount ofair. Therefore, a space utilization rate may be high. Further, for theturbine fan, the air is taken in along an axial direction, and the airis output along a radial direction. The fan 21 may lay on the shoulders,and the central axis of the rotation shaft is perpendicular to theorthographic projection of the first air inlet portion A1. The shell 1is arranged with two first air inlet portions A1 on two opposite sidesof the fan 21. The fan 21 may define the air inlets in an upper side anda lower side of the fan 21. That is, the air may be taken in from theupper side and the lower side at the same time. In this way, an airinlet demand of the fan 21 may be satisfied. Further, intaking the airfrom the upper side and the lower side at the same time may not intakethe hair at left and right sides of the fan, ensuring the user's safety.In other embodiments, the fan 21 may not be limited to the turbine fan,but may be a fan in other types, as long as the fan can be driven by themotor to generate the wind.

As shown in FIGS. 59 and 60, the receiving chamber R1 is defined in anend of the first portion 11 away from the second portion 12. That is,the fan assembly 2 is arranged at the end away from the second portion12, such that a relatively large range of regions may be available tocorrespondingly arrange the first air inlet portion A1. The secondportion 12 is configured to receive an electronic control assembly P1.The electronic control assembly P1 may include a battery, a circuitboard and a switch, and the like. A partition 13 may be arranged insidethe shell 1 to separate the first portion 11 from the second portion 12.The air duct D1 is defined between the receiving cavity R1 and thepartition plate 13. The partition plate 13 prevents the flowing air fromaffecting operation of the electronic control assembly P1, ensuring thesafety of using the neck fan 100. In addition, the air duct D1 isdefined only in the first portion 11, such that the generated wind maynot be consumed in an excessively long air duct D1, allowing the airflowing out of the first air outlet portion C1 to be more stable andcomfortable. It shall be understood that wires may be arranged betweenthe electronic control assembly P1 and the motor, such that theelectronic control assembly P1 may supply power to the motor, and suchthe structure may be available in the art and will not be described indetail herein.

In some embodiments, the shell 1 may not be arranged with the partitionplate 13. The electronic control assembly P1 may be arranged out of theshell 1. The air duct D1 may further extend to the second portion 12.Arranging the electronic control assembly P1 out of the shell 1 allowsthe neck fan 100 to be more slim. Similarly, the receiving chamber R1may be defined in other components of the shell 1, such as in the secondportion 12. Only one fan assembly 2 may be arranged. The presentdisclosure dose not limit the number of the fan assemblies 2, as long asthe fan assembly 2 can drive the external air into the shell 1, transferthe air into a wind, and drive the wind to flow out of the neck fan fromthe first air outlet C1.

As shown in FIGS. 58-60, the central axis of the rotation shaft isperpendicular to the orthographic projection of the first air outletportion C1. In detail, the first air outlet portion C1 extends throughthe first portion 11 and extends diagonally upwards. When the neck fan100 is worn, the first air outlet portion C1 corresponds to a side ofthe neck and blows the air in an upward direction. In this way, the airfrom the first air outlet portion C1 does not flow directly towards theneck, improving the user's experience. The position of the first airoutlet portion C1 is not limited by the present disclosure. The centralaxis of the rotation shaft may alternatively be parallel to theorthographic projection of the first air outlet portion C1. For example,the first air outlet portion C1 may be arranged on a side of the firstportion 11 near the user's neck. Alternatively, an angle may be formedbetween the central axis of the rotation shaft and the orthographicprojection of the first air outlet portion C1.

As shown in FIG. 60, in the air duct D1, the wind guide member 3 extendsfrom the inner wall of the first portion 11 where the first air outletportion C1 is arranged in a direction away from the first air outletportion C1. In this way, the air guide 3 may guide a portion of the airto flow out of the neck fan from the first air outlet portion C1 at afront side of the neck fan, and at the same time, the air guide 3 mayguide the remaining air to flow out of the neck fan from the first airoutlet portion C1 at a rear of the neck fan. In the present embodiment,two wind guide portions 3, which are spaced apart from each other, maybe received in the air duct D1 in a direction of extending from thereceiving chamber R1 and the second portion 12. A slope difference and aheight difference may be present between the two wind guide portions 3.In this way, the air flowing out of the first air outlet portion C1,which is divided by the two wind guide portions 3, may be uniform,improving the user's experience. The number of wind guide portions 3 isnot limited by the present disclosure, as long as the air is evenlyflowing through each part of the first air outlet portion C1, which isdivided by the wind guide portions 3. An edge of a free end of the windguide portion 3 may be wavy or serrated to reduce the wind noise, andthe shape of the edge shall not be limited by the present disclosure.

As shown in FIGS. 58-59 and 62, the shell 1 includes a first shell 101and a second shell 102 that can be engaged with each other. A firstengaging portion may be arranged inside the first shell 101, and asecond engaging portion 1021 may be arranged inside the second shell102. The first engaging portion and the second engaging portion 1021 maybe snapped or embedded or bolted or magnetically connected to eachother, based on the actual situation. A connection manner between thefirst engaging portion and the second engaging portion 1021 is notlimited by the present disclosure. A fan partition plate 111 extendsfrom the inner wall of the first portion 11 and surrounds a part of thefan 21. A space cooperatively defined between the fan partition plate111 and the shell 1 may be suitable to receive the second engagingportion 1021. Further, the fan partition plate 111 extends towards awidth direction of the receiving chamber R1 to form a corner 1111, andthe corner 1111 may serve as a turning tongue of a turbine fan. Thecorner 11111 formed from the fan partition plate 111 reduces a width ofthe air outlet, resulting in a more effective air flowing.

As shown in FIGS. 58-60, an air inlet cover 4 is arranged on an outerside of the first air inlet portion A1, prevent the rain or externaldust from entering the shell 1 and affecting operation of the fanassembly 2. A gap is defined between the air inlet cover 4 and the firstair inlet portion A1 facilitating the air to enter the shell 1. The airinlet cover 4 further prevents the hair from being sucked when the neckfan is operating, ensuring the user's safety.

As shown in FIG. 63, a second embodiment of the neck fan 100 of thepresent disclosure is provided. In the present embodiment, the shell 1is arranged with one first air inlet portion A1 corresponding to onlyone of two opposite sides of the fan 21. In detail, the shell 1 isarranged with one first air inlet portion A1 corresponding to an upperside of the fan 21. In this way, the amount of air intaking may bereduced, but the amount of air flowing out of the neck fan may be moresuitable for people who have a low requirement about the amount of airflowing but require the air flowing to be comfortable. Alternatively,the shell 1 may be arranged with one first air inlet portion A1corresponding to a lower side of the fan 21 only. Other structure andproperties of the present embodiment may be referred to the above firstembodiment and will not be repeated here.

As shown in FIGS. 64-66, a third embodiment of the neck fan is shown. Inthe present embodiment, the shell 1 is arranged with the first air inletportion A1 corresponding to a radial outer side of the fan 21. Thecentral axis X1 of the rotation shaft is parallel to the orthographicprojection of the first air inlet portion A1. The fan 21 is arranged atthe end of the first portion 11 away from the second portion 12. Thefirst air inlet portion A1 may be arranged on a large half circle of theend of the first portion 11. In this way, a relatively large area may beavailable to arrange the first air inlet portion A1, increasing the airintaking volume and a range for intaking the air. At the same time,since the fan 21 is the turbine fan, the fan may intake the air alongthe axial direction and outputs the wind along the radial direction. Inorder to avoid the air coming out of the second air outlet portion 23 ofthe fan 21 from colliding with the air entering the neck fan from thefirst air inlet portion A1 (which corresponds to radial outside of thefan), a fan shell 24 is arranged on the outside of the fan 21 to guidethe air inlet and the air outlet of the fan 22. In this way, the airinlet and the air outlet may be achieved smoother. Other structures andproperties of the present embodiment may be the same as those of thefirst embodiment and will not be repeated here.

In other embodiments, a first angle is present between the central axisX1 of the rotation shaft and the orthographic projection of the firstair inlet portion A1. The first air inlet portion A1 and the first airoutlet portion C1 may be arranged at other positions, as long as thefirst angle can be generated between the central axis X1 of the rotationshaft and the first air inlet portion A1, a second angle can begenerated between the central axis X1 of the rotation shaft and thefirst air outlet portion C1, and each of the first angle and the secondangle is in a range of 0-90 degrees (including the 0 degree and the 90degrees). When the air inlet of the first air inlet portion A1 conflictswith the air outlet of the second air outlet portion 23 of the fan 22,the fan shell 24 may be arranged at the outside of the fan 22 to guidethe air inlet and the air outlet of the fan 22. Compared to the art,positions of the neck fan 100 in the present embodiment available forarranging the first air inlet portion A1 and the second air outletportion C1 may be increased.

FIGS. 67-73 show a neck fan according to another embodiment of thepresent disclosure.

As shown in FIGS. 67 and 68, FIG. 67 is a schematic view of a neck fanaccording to an embodiment of the present disclosure, and FIG. 68 is aschematic view of the neck fan shown in FIG. 67 from another view angle.The neck fan 1 includes a shell 10, serving as a neck piece that hangsaround the user's neck. When the neck fan is worn at the neck, theuser's hands may be released and may perform other operations whileusing the neck fan. It shall be understood that, in the presentembodiment, in order to allow the neck fan 1 to be worn more closely tothe neck, the shell 10 may be curved.

As shown in FIGS. 69 and 70, FIG. 69 is an exploded view of the neck fanshown in FIG. 67, and FIG. 70 is an exploded view of the neck fan shownin FIG. 68. In the present embodiment, the neck fan 1 may furtherinclude at least three fan assemblies 20 arranged inside the shell 10.The shell 10 includes a first shell 11, a second shell 12 and a thirdshell 13. The first shell 11 and said second shell 12 may be configuredto hang near two opposite sides of the user's neck respectively. Thethird shell 13 may be connected to the first shell 11 and the secondshell 12 and disposed between the first shell 11 and the second shell12. Each of the first shell 11, the second shell 12 and the third shell13 defines a receiving cavity 14, an air inlet 15 communicated with thereceiving cavity 14 and an air outlet 16 communicated with the receivingcavity 14. One fan assembly 20 may be received in each of the receivingcavity 14 of the first shell 11, the receiving cavity 14 of the secondshell 12 and the receiving cavity 14 of the third shell 13, and may beconfigured to guide the air to flow from the air inlet 15 to the airoutlet 16 respectively. It shall be understood that the first shell 11,the second shell 12 and the third shell 13 of the neck fan 1 may beconnected to form an arc, such that the neck fan may fit curvature ofthe user's neck and may be easily worn. Further, the first shell 11 andthe second shell 12 are disposed at two opposite sides of the user'sneck, weights of the two sides of the neck fan may be balanced, the neckfan may be worn stably and not easily fall off from the user's neck. Inaddition, receiving one fan assembly 20 in the receiving cavity 14 ofthe third shell 13 allows the neck fan 1 to blow out the wind towardsthe back of the neck, and airflows may surround the user's neck and mayflow uniformly, such that the user's neck may be cooled quickly,improving the user's experience.

According to the neck fan 1 in the above embodiment, the arc-shapedshell 10 allows the neck fan 1 to hang around the neck, the neck fan mayblow the wind directly towards the neck and face, the user may be cooledquickly, improving the user's experience. In addition, arranging threefan assemblies 20 may increase the air out-flowing efficiency andincrease the air output volume, such that a large area can be covered bythe air out of the neck fan, further enabling the user to be cooledquickly, improving the user's experience. The three fan assemblies 20are received in receiving cavities 14, and therefore, the hair orforeign matters may not be caught in the fan assemblies 20, ensuring theuser's safety while using the neck fan 1.

As shown in FIGS. 67-70, at least one of the first shell 11, the secondshell 12 and the third shell 13 includes a first portion 111, a secondportion 112 and a third portion 113. The third portion 113 is connectedto the first portion 111 and the second portion 112 and is disposedbetween the first portion 111 and the second portion 112. The receivingcavity 14 extends from the first portion 111 through the third portion113 to the second portion 112. The receiving cavity 14 includes a firstsub-cavity 141 in the first portion 111, a second sub-cavity 142 in thesecond portion 112 and a third sub-cavity 143 in the third portion 113.The first sub-cavity 141, the second sub-cavity 142 and the thirdsub-cavity 143 are communicated with each other. The fan assembly 20 isreceived in the third sub-cavity 143 of the third portion 113 and isconfigured to guide the air from the air inlet 15 to the air outlet 16.

It shall be understood that, in the neck fan 1 of the presentembodiment, the first shell 11 and the second shell 12, which aredisposed at two opposite sides of the user's neck, may be structurallysymmetrical. Each of the first shell 11, the second shell 12 and thethird shell 13 may include the first portion 111, the second portion112, and the third portion 113. One fan assembly 20 is arranged insideeach of the third portion 113 of the first shell 11 and the thirdportion 113 of the second shell 12. While the neck fan 1 is operating,the fan assemblies 20 arranged at the two opposite sides of the user'sneck may respectively guide the air from the air inlet 15 of the firstshell 11 to flow to the air outlet 16 of the first shell 11 and guidethe air from the air inlet 15 of the second shell 12 to flow to the airoutlet 16 of the second shell 12. In addition, one fan assembly 20 isarranged in the third portion 113 of the third shell 13 and isconfigured to guide the air from the air inlet 15 of the third shell 13to flow to the air outlet 16 of the third shell 13. Since the receivingcavity 14 is defined in each of the first shell 11, the second shell 12,and the third shell 13, and the fan assembly 20 is received in the thirdsub-cavity 143 of the third cavity 14 of each of the first shell 11, thesecond shell 12, and the third shell 13, the air flowing out of thefirst shell 11, the air flowing out of the second shell 12, and the airflowing out of the third shell 13 may be spaced apart from each otherand may not interfere with each other. Therefore, the loss in the airout flowing may be reduced, and the efficiency of air flowing out of theneck fan 1 may be improved.

As shown in FIGS. 67 and 69, the air outlet 16 includes a first airoutlet 161 defined in the first portion 111 and communicated with thefirst sub-cavity 141 and a second air outlet 162 defined in the secondportion 112 and communicated with the second sub-cavity 142. The thirdportion 113 includes a wind-free region N. The wind-free region N isdisposed between the first air outlet 161 and the second air outlet 162and corresponds to a position where the fan assembly 20 is arranged. Itshall be understood that, in the present embodiment, the wind-freeregion N does not define any air outlet, but defines a blind hole N1,which does not allow any air to flow through. Further, the wind-freeregion N corresponds to the fan assembly 20, such that the windgenerated by the fan assembly 20 may flow towards the first air outlet161 and the second air outlet 162, which locate at two opposite sides ofthe fan assembly 20. In this way, the air flowing efficiency may beincreased, the air may flow out of the neck fan more softly and morecomfortably. In some embodiments, the wind-free region N may be a regionwithout any hole. Alternatively, the wind-free region N may defineopenings, and a blocking plate may be arranged to block the openings,preventing the air from flowing through the openings, such that thewind-free region N is formed. According to the present embodiment, thewind-free region N separates the first air outlet 161 and the second airoutlet 162, such that the air may be distributed to two sides, the airmay not be concentrated towards air outlets on one side, and therefore,the air volume may not be excessively high on one side, and an airblowing time may be not be excessively long on one side, the user may becomfortable, and the user's safety while using the neck fan 1 may beimproved.

As shown in FIGS. 69 and 70, each of the first portion 111, the secondportion 112 and the third portion 113 includes an inner plate 111 a, anouter plate 111 b, a first connection plate 111 c, and a secondconnection plate 111 d. The inner plate 111 a is disposed near the neck.The outer plate 111 b is disposed opposite to the inner plate 111 a. Thefirst connection plate 111 c is connected to the inner plate 111 a andthe outer plate 111 b and is disposed near the head. The secondconnection plate 111 d is disposed opposite to the first connectionplate 111 c. The air inlet 15 is defined in at least one of the innerplate 111 a of the third portion 113 and the outer plate 111 b of thethird portion 113. The first air outlet 161 is defined in the firstconnection plate 111 c of the first portion 111. The second air outlet162 is defined in the first connection plate 111 c of the second portion112. The wind-free region N is disposed on the first connection plate111 c of the third portion 113. Furthermore, the wind-free region N ofthe present embodiment may correspond to the user's ears and a middle ofthe neck, preventing the wind noise generated when the wind blowsdirectly to the ears, and preventing the neck from being uncomfortablewhen the wind blows directly to the neck. Further, hearing of the usermay be protected, improving the user's experience. In the presentembodiment, in order to allow the fan assembly 20 to blow the airtowards the user's head to cool the user quickly and to improve theuser's experience, the first air outlet 161 may be defined in the firstconnection plate 111 c of the first portion 111, and the second airoutlet 162 may be defined in the first connection plate 111 c of thesecond portion 112. For the third shell, the first air outlet 161 may bedefined in the inner plate 111 a of the first portion 111, and thesecond air outlet 162 may be defined in the inner plate 111 a of thesecond portion 112.

In some embodiments, in order to further increase the air flowing volumeand an area covered by the air flowing out of the neck fan, in additionto defining the first air outlet 161 in the first connection plate 111 cof the first portion 111 and defining the second air outlet 162 in thefirst connection plate 111 c of the second the 112, the first air outlet161 may further be defined in at least one of the inner plate 111 a andthe second connection plate 111 d of the first portion 111, and thesecond air outlet 162 may further be defined in at least one of theinner plate 111 a and the second connection plate 111 d of the secondportion 112. According to the present embodiment, the first air outlet161 is defined in the first connection plate 111 c of the first portion111, and the second air outlet 162 is defined in the first connectionplate 111 c of the second portion 112. In this way, the fan assembly 20is disposed located between the first air outlet 161 and the second airoutlet 162. The fan assembly 20 may drive the air from the air inlet 15to flow along to opposite sides of the fan assembly 20 to reach thefirst air outlet 161 and the second air outlet 162. The air flowing outof the first air outlet 161 and the second air outlet 162 do notinterfere each other, reducing the loss of the air while outputting theair out of the neck fan. In addition, the air inlet 15 is defined in theinner plate 111 a of the third portion 113 and the outer plate 111 b ofthe third portion 113. In this way, the air intaking through the airinlet 15 does not interfere the air flowing out of the neck fan throughthe first air outlet 161 and the second air outlet 162. Further,circulation of intaking the air and outputting the air may be achieved,the efficiency of the air flowing out of the neck fan 1 may be improved.

As shown in FIGS. 67-70, the air inlet 15 is defined in the inner plate111 a of the third portion 113 and in the outer plate 111 b of the thirdportion 113. The outer plate 111 b of the third portion 113 includes afirst protrusion 111 f protruding from the outer plate 111 b away fromthe user's neck. The first projection 111 f defines a plurality of airinlets 151, and the plurality of air inlets 151 may be arranged as acircle. The inner plate 111 a of the third portion 113 includes a secondprotrusion 111 g protruding away from the user's neck. A plurality ofair inlets 152 are defined and arranged as circle at a periphery of thesecond protrusion 111 g. In some embodiments, the air inlets 15 may bedefined in at least one of the inner plate 111 a of the first portion111, the outer plate 111 b of the first portion 111, the inner plate 111a of the second portion 112, and the outer plate 111 b of the secondportion 112. In the present embodiment, the air inlets 15 are defined inthe inner plate 111 a of the third portion 113 and the outer plate 111 bof the third portion 113. In this way, the air inlets 15 may correspondto the fan assembly 20, preventing the wind stifling effect caused whenthe air inlet 15 is defined only in the inner plate 111 a or only in theouter plate 111 b. The air may fluently flow all the way through the airinlet 15, the air outlet 16 and the air duct communicating with the airinlet 15 and the air outlet 16. In this way, the air may flow fluently,and the wind noise may be reduced. In the present embodiment, the airinlet 15 is defined in the inner plate 111 a of the third portion 113and the outer plate 111 b of the third portion 113, such that the amountof the air intaken from the fan assembly 20 may be increased, and theefficiency of the air flowing out of the neck fan 1 may be improved.

As shown in FIG. 71, FIG. 71 illustrates an inside of a first portion ofthe neck fan shown in FIG. 67. In order to reduce the air flowing lossand increase the air out flowing efficiency, in some embodiments, atleast one of the first shell 11, the second shell 12 further includes afirst partition portion 114, a second partition portion 115, a first airguide portion 116, and a second air guide portion 117. The firstpartition portion 114 is at least partially received in said firstsub-cavity 141 and covers a side of the fan assembly 20 near the user'sface and the first portion 111. The second partition portion 115 coversa periphery of the fan assembly 20 and is opposite to the firstpartition portion 114. The first air guide portion 116 is connected tothe first partition portion 114 and is received in the first sub-cavity141. The second air guide portion 117 is received in the secondsub-cavity 142. The first air guide portion 116 divides the firstsub-cavity 141 into a first receiving space 141 a and a first air duct141 b communicated with the first outlet 161 of the first portion 111.The second air guide portion 117 divides the second sub-cavity 142 intoa second receiving space 142 a and a second air duct 142 b communicatedwith the second outlet 162 of the second portion 112. It shall beunderstood that the wind generated by the fan assembly 20 is directed totwo opposite sides of the fan assembly 20 and guided by the firstpartition portion 114 and the second partition portion 115 respectivelyto flow to the first air guide portion 116 and the second air guideportion 117. Further, the air is guided by the first air guide portion116 to flow into the first air duct 141 b to be blown out through thefirst air outlet 161, and guided by the second air guide portion 117 toflow into the second air duct 142 b to be blown out through the secondair outlet 162, respectively, as indicated by arrows in FIG. 71.According to the present embodiment, the first partition portion 114 andthe first air guide portion 116 are arranged, such that the firstsub-cavity 141 is divided into a first receiving space 141 a and a firstair duct 141 b communicated with the first outlet 161 of the firstportion 111. The second partition portion 115 and the second air guideportion 117 are arranged, such that the second sub-cavity 142 is dividedinto a second receiving space 142 a and a first air duct 142 bcommunicated with the second outlet 162 of the second portion 112. Thefirst air duct 141 b, the second air duct 142 b may direct the windgenerated by the fan assembly 20 to flow to the first outlet 161 and thesecond outlet 162 respectively. In this way, loss of the airflows whileblowing out the air is reduced, positions towards which the air is blownmay be controlled accurately, and the efficiency of the air flowing outof the neck fan may be increased.

As shown in FIG. 72, FIG. 72 illustrates an inside of a first portion ofa neck fan according to another embodiment of the present disclosure. Inorder to reduce the air loss of the neck fan 1 and increase the airout-flowing efficiency, in some embodiments, at least one of the firstshell 11 and the second shell 12 further includes the first partitionportion 114, the second partition portion 115, a first air guide portion116, and a second air guide portion 117. The first partition portion 114is at least partially received in the third sub-cavity 143 and coversthe side of the fan assembly 20 near the user's face and the firstportion 111. The second partition portion 115 covers the periphery ofthe fan assembly 20 and is opposite to said first the first partitionsection 114. The first air guide portion 116 is disposed in the firstsub-cavity 141. The second air guide portion 117 is disposed in saidsecond sub-cavity 142 and connected to the second partition portion 115.The first air guide portion 116 divides the first sub-cavity 141 into afirst receiving space 141 a and a first air duct 141 b communicated withthe first outlet 161 of the first portion 111. The second air guide 117divides the second sub-cavity 142 into a second receiving space 142 aand a second air duct 142 b communicated with the second outlet 162 ofthe second portion 112. It shall be understood that the wind generatedby the fan assembly 20 is directed two opposite sides of the fanassembly 20 and is guided by the first partition portion 114 and thesecond partition portion 115 to the first air guide portion 116 and thesecond air guide portion 117, respectively. Further, the wind is guidedby said first air guide portion 116 to flow into the first air duct 141a to further be blown out of the neck fan through the first air outlet161, and at the same time, the wind is guided by said second air guideportion 117 to flow into the second air duct 141 b to further be blownout of the neck fan through the second air outlet 162, as indicated byarrows in the FIG. 72. According to the present embodiment, the firstpartition portion 114 and the first air guide portion 116 are arrangedto divide the first sub-cavity 141 into the first receiving space 141 aand the first air duct 141 b communicated with the first outlet 161 ofthe first portion 111. The second partition portion 115 and the secondair guide portion 117 are arranged to divide the second sub-cavity 142into the second receiving space 142 a and the second air duct 142 bcommunicated with the second outlet 162 of the second portion 112. Thefirst air duct 141 b and the second air duct 142 b direct the windgenerated by the fan assembly 20 to flow to the first outlet 161 and thesecond outlet 162 respectively. In this way, the loss in the air outflowing may be reduced, positions towards which the air is blown may becontrolled accurately, and the efficiency of the air flowing out of theneck fan may be increased.

In some embodiments, the first air guide portion 116 received in thefirst sub-cavity 141 is connected to the first partition portion 114,and the second air guide portion 117 is connected to the secondpartition portion 115.

Further, as shown in FIGS. 71 and 72, the neck fan 1 includes a firstauxiliary air guide plate 118 and a second auxiliary air guide plate119. The first auxiliary air guide plate 118 is configured to divide thefirst air duct 141 b into a first sub-duct 141 c and a second sub-duct141 d. The first air duct 141 b is communicated with a portion of aplurality of air outlets 16 of the first portion 111. The secondsub-duct 141 d is communicated with another portion of the air outlets16 of the first portion 111. The second auxiliary air guide plate 119 isconfigured to divide the second air duct 142 b into a third sub-duct 142c and a fourth sub-duct 142 d. The third sub-duct 142 c is communicatedwith a portion of a plurality of air outlets 16 of the second portion112. The fourth sub-duct 142 d is communicated with another portion ofthe air outlets 16 of the second portion 112. In the present embodiment,an end portion of the first auxiliary air guide plate 118 near the firstair outlet 161 may be substantially perpendicular to a wall of the shellthat defines the first air outlet 161, and an end portion of the secondauxiliary air guide plate 119 near the second air outlet 162 may besubstantially perpendicular to a wall of the shell that defines thesecond air outlet 162. In this way, the air is guided by the firstauxiliary air guide plate 118 and the second auxiliary air guide plate119, such that the air is blown out of the neck fan along a directionsubstantially perpendicular to a plane where the first connection plate111 c is arranged. In this way, the wind is blown to the userstraightforwardly. A problem of interference between inclined airflowing may be solved, and the wind force may be maintained. Accordingto the present embodiment, the first auxiliary air guide plate 118divides the first air duct 141 b into the first sub-duct 141 c and thesecond sub-duct 141 d. The second auxiliary air guide plate 119 isarranged to divide the second air duct 142 b into the third sub-duct 142c and the fourth sub-duct 142 d. In this way, the air may uniformly flowout through the first air outlet 161 and the second air outlet 162, theloss in the air out flowing may be reduced, positions towards which theair is blown may be controlled accurately, and the efficiency of the airflowing out of the neck fan may be increased.

As shown in FIGS. 69-72, the neck fan 1 further includes an electroniccontrol assembly 60. The electronic control assembly 60 includes atleast one of a battery 61, a circuit board 62 and a control button 63.At least part of the electronic control assembly 60 is received in thefirst receiving space 141 a or the second receiving space 142 a. Theelectronic control assembly 60 allows the user to manipulate the neckfan 1 easily. The battery 61 may further supply power to the neck fan 1when an external power source is unavailable, such that the neck fan 1may be portable and may be used more conveniently, and the neck fan 1may be applied in various application scenarios. In addition, the firstair guide portion 116 is connected to the first partition portion 114,and at least part of the electronic control assembly 60 is received inthe first receiving space 141 a. Alternatively, the second air guideportion 117 is connected to the second partition section 115, and atleast part of the electronic control assembly 60 is received in thesecond receiving space 141 b. Alternatively, the first air guide portion116 is connected to the first partition portion 114, the second airguide portion 117 is connected to the second partition section 115, andat least part of the electronic control assembly 60 is received in thefirst receiving space 141 a or the second receiving space 141 b.Receiving at least part of the electronic control assembly 60 in thefirst receiving space 141 a or the second receiving space 141 b ensuresair tightness of the first receiving space 141 a or the second receivingspace 142 a that receives the electronic control assembly 60. In thisway, external moisture, dust, and the like may be prevented fromentering the neck fan through the air inlet, improving the safety of theneck fan 1.

As shown in FIG. 73, FIG. 73 illustrates an inside of a third portion ofthe neck fan shown in FIG. 67. The third shell 13 includes a thirdpartition plate 113 a, a first extension portion 113 b, a secondextension portion 113 c, and a third air guide portion 113 f. The thirdpartition plate 113 a covers a side of the fan assembly 20 away from thefirst connection plate 111 c. The first extension portion 113 b isconnected to an end of the third partition portion 113 a near the firstportion 111 and the first connection plate 111 c. The second extensionportion 113 c is connected to an end of the third partition plate 113 anear the second portion 112 and the first connection plate 111 c. Thethird air guide portion 113 f covers a side of the fan assembly 20 awayfrom the third partition plate 113 a and is connected to the wind-freeregion N. The third partition portion 113 a extends along a curveddirection. The fan assembly 20 is arranged eccentrically relative to thethird partition plate 113 a. The fan assembly 20 drives the air from theair inlet 15 to flow through the third partition portion 113 a, thefirst extension portion 113 b and the third air guide portion 113 f toreach the first air outlet 161. The fan assembly 20 drives the air fromthe air inlet 15 to flow through the second extension 113 c to reach thesecond air outlet 162. It shall be understood that, in the presentembodiment, the air out of the fan assembly 20 is directed by the thirdpartition portion 113 a, the first extension portion 113 b, and thesecond extension portion 113 c, and further guided by the third airguide portion 113 f, reaching and flowing out of the neck fan throughthe first air outlet 161 and the second air outlet 162, as indicated byarrows shown in FIG. 73. In this way, an air blowing effect may beensured, and an air blowing force may be ensured. Arranging the thirdpartition portion 113 a, the first extension portion 113 b, the secondextension portion 113 c and the third air guide portion 113 f allows theair to uniformly flow out of the first air outlet 161 and the second airoutlet 162 of the third shell 13. A loss in the air flowing may bereduced, positions towards which the air is blown may be controlledaccurately, and the efficiency of the air flowing out of the neck fanmay be increased.

Further, as shown in FIGS. 69-71, each of the first shell 11 and thesecond shell 12 is rotatably connected to the third shell 13. The shell10 further includes a first connection member 30. The first connectionmember 30 is connected to the first shell 11 and the third shell 13 anddisposed between the first shell 11 and the third shell 13. The shell 10further includes a second connection member 40. The second connectionmember 40 is connected to the second shell 12 and the third shell 13 anddisposed between the second shell 12 and the third shell 13. The firstconnection member 30 includes two first connection portions 31 and asecond connection portion 32. The two first connection portions 31 arearranged inside the first shell 11 and the third shell 13 respectively,and the second connection portion 32 is connected to the two firstconnection portions 31. The second connection portion 32 extends throughthe third shell 13 and the first shell 11 and is rotatable. In this way,the first shell 11 is rotatably connected to the third shell 13. Thesecond connection member 40 includes two third connection portions 41and a fourth connection portion 42. The two third connection portions 41are arranged inside the second shell 12 and the third shell 13,respectively. The fourth connection portion 42 is connected to the twothird connection portions 41. The fourth connection portion 42 extendsthrough the third shell 13 and the second shell 12 and is rotatable. Inthis way, the second shell 12 is rotatably connected to the third shell13. It shall be understood that when the user is wearing the neck fan 1,the user may turn the first connection member 30 and the secondconnection member 40 to increase a gap between the first shell 11 andthe second shell 12. The first shell 11 and the second shell 12 may bereset when relaxed. In this way, the user may easily wear the neck fan 1around the neck.

In some embodiments, as shown in FIGS. 69 and 70, the fan assembly 20includes a turbine fan 21. The turbine fan 21 includes a fan shaft 211and a plurality of turbine blades 212 arranged to surround the fan shaft211. An air flowing direction of the turbine fan 21 is perpendicular toan extending direction of the fan shaft 211. In this way, the fan mayoutput a large air volume but occupy a small space, increasing an airout-flowing rate of the neck fan 1. Since the fan assembly 20 includesthe turbine fan 21, operation noise of the neck fan 1 may be effectivelyreduced, and the efficiency of the air flowing out of the neck fan 1 maybe improved. The plurality of turbine blades 212 include a first endface 213 and a second end face 214 arranged in the extending directionof the fan shaft 211. The first end face 213 corresponds to the innerplate 111 a of the third portion 113, and the second end face 214corresponds to the outer plate 111 b of the third portion 113. The fanshaft 211 extends in a direction from the inner plate 111 a to the outerplate 111 b. A diameter of the turbine fan 21 is in the range of 35 mmto 45 mm. A thickness of the turbine fan 21 in the extending directionof the fan shaft 211 is in the range of 10 mm to 25 mm. A distancebetween the first end face 213 and the corresponding inner plate 111 ais in a range of 1 mm to 6 mm; and/or a distance between the second endface 214 and the corresponding outer plate 111 b is in a range of 1 mmto 6 mm. In some embodiments, the distance between the first end face213 and the inner plate 111 a may be 1 mm; and/or the distance betweenthe second end face 214 and the outer plate 111 b may be 1 mm. Accordingto the present disclosure, the distance between the first end face 213and the corresponding inner plate 111 a is in the range of 1 mm to 6 mm,and/or the distance between the second end face 214 and thecorresponding outer plate 111 b is in the range of 1 mm to 6 mm; thediameter of the turbine fan 21 is in the range of 35 mm to 45 mm; andthe thickness of the turbine fan 21 in the extending direction of thefan shaft 211 is in the range of 10 mm to 25 mm, the efficiency of theair flowing out of the fan assembly 20 may be improved. In someembodiments, when the distance between the first end face 213 and theinner plate 111 a is 1 mm, and/or the distance between the second endface 214 and the outer plate 111 b is 1 mm, the efficiency of the airflowing out of the fan assembly 20 may be optimal.

As shown in FIGS. 69 and 70, the neck fan 1 further includes a supportmember 50. A side of the third shell 13 near the user's neck is arrangedwith a mounting portion 51. The support member 50 is mounted on themounting portion 51. In the present embodiment, two mounting portions 51and two support members 50 are arranged, but the number shall not belimited by the present disclosure. The two mounting portions 51 aredisposed at end of the third shell 13 near the first shell 11 and at endof the third shell 13 near the second shell 12, respectively. A recessedregion is disposed between the two support members 50, and the airoutlet 16 is defined in the recessed region. In the present embodiment,when the user is using the neck fan 1, the support members 50 may abutagainst two sides of the back neck to support the neck fan 1, allowingthe neck fan 1 to leave a certain distance away from the user's neck. Inaddition, the recessed region is disposed between the two supportmembers 50, such that each of the end of the third shell 13 near thefirst shell 11 and the end of the third shell 13 near the second shell12 defines an air inlet 16. In this way, the air may flow out of the airoutlet 16 and may be blown directly towards the back neck at therecessed region. The recessed region between the two support members 50may define an air inlet 15, allowing the fan assembly 20 in the thirdshell 13 to intake the air. In the present embodiment, the supportmember 50 is arranged to support the neck fan 1 on the neck, and a gapis defined between the neck fan 1 and the neck, allowing the air to beintaken or flow out in the recessed region fluently, improving theuser's experience.

As shown in FIGS. 67-69, the support member 50 includes a first supportportion 53 mounted on the mounting portion 51 and a second supportportion 52 connected to an end of the first support portion 53 away fromthe mounting portion 51. A side of the second support portion 52 nearthe user's neck is arranged with a recessed portion 521. The supportmember 50 has a support direction towards the user's neck. A diameter ofthe second support portion 52 perpendicular to the support direction isgreater than a diameter of the first support portion 53 perpendicular tothe support direction. It shall be understood that, the recessed portion521 prevents the neck fan 1 from contacting the skin without a gap, suchthat the user may be comfortable when wearing the neck fan. A largerdiameter of the second support portion 52 increases a contact areabetween the second support portion 52 and the neck, such that a certainspace for movement may be provided at an outer edge, reducing a supportpressure, such that the user may be comfortable.

FIGS. 74-76 show a neck fan according to an embodiment of the presentdisclosure.

FIG. 74 illustrates a fan assembly and a neck fan. The neck fan includesat least two fan bodies 2 and a neck body 1 connected between the twofan bodies 2. Each of the two fan bodies 2 includes an air outletassembly to blow out air. The two fan bodies 2 and the neck body 1cooperatively define a neck cavity. The neck fan is worn around the neckvia the neck cavity, such that the user may use the neck fan.

As shown in FIGS. 74 and 75, in an embodiment, the air outlet assemblyincludes a shell 21, a wind guide tongue 6 and a fan assembly 22. Theshell 21 defines a receiving cavity 5. The fan assembly 22 is receivedin the receiving cavity 5. The wind guide tongue 6 is received in thereceiving cavity 5 and surrounds the fan assembly 22. A gap is definedbetween the wind guide tongue 6 and the fan assembly 22. In the presentembodiment, the fan assembly 22 is a centrifugal fan. The centrifugalfan intakes an airflow axially and out puts an air flow in acircumferential direction by taking a centrifugal force.

The shell 21 includes a top wall 211 and a bottom wall 212 thatcooperatively define the receiving cavity 5. When the neck fan is worn,the top wall 211 is located above the bottom wall 212, the top wall 211is located above the fan assembly 22, and the bottom wall 212 is locatedbelow the fan assembly 22. The top wall 211 defines an air outlet 3 andan air outlet 4. The air outlet 3 and an air outlet 4 communicate withthe receiving cavity 5. The air outlet 3 and the fan assembly 22 arelocated on a first side of the wind guide tongue 6, and the air outlet 4is located on a second side of the wind guide tongue 6, opposite to thefirst side. That is, the air outlet 4 is located on a side of the windguide tongue 6 away from the fan assembly 22. The wind guide tongue 6 isdisposed between the air outlet 4 and the fan assembly 22. The windguide tongue 6 is configured to guide an air flowing direction. Theairflow generated by the fan assembly 22 is guided by the wind guidetongue 6 to flow to the air outlet 3 and the air outlet 4 respectively,such that the air flows out of the neck fan from both the air outlet 3and the air outlet 4, increasing the area covered by the air flowing outof the neck fan. The wind guide tongue 6 is further configured tocontrol the air flowing direction. The wind guide tongue 6 controls theairflow generated by the fan assembly 22 to flow the air outlet 3 andthe air outlet 4 respectively. In this way, the air may uniformly flowout of the neck fan through the air outlet 3 and the air outlet 4.

As shown in FIGS. 75 and 76, the wind guide tongue 6 is a curved plate.The curved plate surrounds the fan assembly 22. The curved plate guidesthe air flowing out of the fan assembly 22. The airflow guided by thecurved plate flows near and along the curved plate to reach the airoutlet 3 and the air outlet 4. In addition, the airflow may be guided bythe wind guide tongue 6 flowing towards the air outlet 4, based on theCoanda effect, when the airflow reaches an end of the wind guide tongue6, and when a speed of the airflow is large enough, the airflow maygenerate the centrifugal force. A part of the airflow may be releasedfrom the Coanda effect of the wind guide tongue 6, and another part ofthe airflow continues to flow along a wall of the wind guide tongue dueto the Coanda effect, and the air may further flow away from the windguide tongue 6 to reach the air outlet 4. The curved plate furthercontrols the air flowing direction. The curved plate controls the airflowing out of the fan assembly 22 to flow to the air outlet 3 and airoutlet 4 respectively. In this way, the air may uniformly flow out ofthe air outlet 3 and air outlet 4.

In detail, the fan assembly 22 includes a circumference wall 221. Adistance between the circumference wall 221 of the fan assembly 22 andthe curved plate is 1 mm to 6 mm, preferably 2.5 mm to 4 mm. The fanassembly 22 is cylindrical. A diameter (curvature) of the curved plateis adapted with a diameter of the fan assembly 22. The diameter of thecurved plate is preferably greater than or equal to the diameter of thefan assembly 22. A centre of the curved plate is located on a side ofthe fan assembly 22, i.e. on a first side of the curved plate.

More specifically, in an embodiment, the diameter of the curved plate isin a range from 40 mm to 60 mm, preferably 45 mm to 55 mm.

In some embodiments, the wind guide tongue 6 includes a first end and asecond end opposite the first end. The first end is away from the topwall 211 of the shell 21 and is bent and extending towards the top wall211. The first end is bent and extends away from the fan assembly 22. Inmore detail, the first end is bent and extending to form a semicircularshape in the direction away from the fan assembly 22. That is, the firstend includes a bent portion 61 connected to the curved plate and a freeend 62 disposed at an end of the bent portion. The bent portion 61 isbent, shown as a semicircle. The free end 62 is disposed at the end ofthe bent portion 61. The free end 62 extends towards the top wall 211.In some embodiments, the first end may be bent and extending away fromthe fan assembly 22 to form other suitable shapes. A radius of the bentportion 61 is in a range of 0.5 mm to 5 mm, preferably 1 mm to 4 mm. Adistance from a circular center of the bent portion 61 to the top wall211 is in a range of 6 mm to 25 mm, preferably from 15 mm to 22 mm. Anextending length of the free end 62 is in a range of 0.1 mm to 1.5 mm. Agap is defined between an end of the free end 62 and the top wall 211 ofthe shell 21. The air flowing out of the fan assembly 22 is guided bythe wind guide tongue 6 to flow from the first side and the second sideof the wind guide tongue 6 to reach the air outlet 3 and the air outlet4 respectively. The airflow directed to the second side via the firstend of the wind guide tongue 6 may flow near and along the wind guidetongue 6 according to the Coanda effect. That is, the airflow followsthe first end of the wind guide tongue 6 towards a region where thesemicircular portion is formed and extending away from the fan assembly22, and the air further flows to reach the air outlet 4. The second endof the wind guide tongue 6 is fixedly connected to top wall 211 of theshell 21. The second end of the wind guide tongue 6, compared to thefirst end, is further away from the fan assembly, and that is, along adirection from the second end to the first end, the first end is closerto the fan assembly 22.

In some embodiments, the second end of the wind guide tongue 6 may notbe fixedly connected to the top wall 211, and a gap may be definedbetween the second end and the top wall 211 of the shell 21.

It shall be understood that, in some embodiments, the wind guide tongue6 may be a curved plate or a plurality of curved plates splicedtogether. A gap may be defined between two adjacent curved plates, ortwo adjacent curved plates may be connected.

In some embodiments, the air outlet 3 and the air outlet 4 are bothdefined in the top wall 211 of the shell 21. The wind guide tongue 6 isdisposed between the air outlet 3 and the air outlet 4. That is, thesecond end of the wind guide tongue 6 is disposed between the air outlet3 and the air outlet 4. The wind guide tongue 6 divides the receivingcavity 5 into a first air duct 51 and a second air duct 52. The firstair duct 51 is communicated with the air outlet 3, and the second airduct 52 is communicated with the air outlet 4.

The air outlet 3 and the air outlet 4 are spaced apart from each other.A blind hole 9 is defined between the air outlet 3 and the air outlet 4.The air outlet 3 includes two sub-outlets, and a gap is defined betweenthe two sub-outlets. The air outlet 4 includes three sub-outlets, thethree sub-outlets are spaced apart from each other, and a gap is definedbetween every two adjacent sub-outlets.

The receiving cavity 5 is defined to further receive an air guide plate7 and a partition plate 8. Two ends of the air guide plate 7 areconnected to the top wall 211 and the bottom wall 212 of the shell 21respectively, and two ends of the partition plate 8 are connected to thetop wall 211 and the bottom wall 212 of the shell 21 respectively. Theair guide plate 7 and the partition plate 8 are disposed on two oppositesides of the fan assembly 22. A connection position between the airguide plate 7 and the top wall 211 of the shell 21 is disposed at arelative outer side of the air outlet 4 away from the air outlet 3. Aconnection position between the partition plate 8 and the top wall 211of the shell 21 is disposed at a relative outer side of the air outlet 3away from the air outlet 4. When the neck fan is worn, a connectionposition between the air guide plate 7 and the bottom wall 212 of theshell 21 and a connection position between the partition plate 8 and thebottom wall 212 of the shell 21 are disposed below the fan assembly 22.A gap is defined between the connection position between the air guideplate 7 and the bottom wall 212 of the shell 21 and the connectionposition between the partition plate 8 and the bottom wall 212 of theshell 21. The air guide plate 7 and the partition plate 8 are arrangedinclined with respect to each other, such that the air guide plate 7 andthe partition plate 8 can guide the airflow. The air guide plate 7 andthe top wall 211 cooperatively define a second air duct 52, and the windguide tongue 6 is received in the second air duct 52. More specifically,the air guide plate 7, the top wall 211, and the wind guide tongue 6cooperatively define the second air duct 52. The partition plate 8 andthe top wall 211 cooperatively define a first air duct 51. The fanassembly 22 is received in the first air duct 51. More specifically, thefan assembly 22, the partition plate 8, and the top wall 211cooperatively define the first air duct 51. In other words, the windguide tongue 6, the bottom wall 212, the partition plate 8, and the topwall 211 cooperatively define the first air duct 51.

According to the present embodiment, the receiving cavity 5 is definedto receive the wind guide tongue 6. The wind guide tongue 6 divides thev cavity 5 into the first air duct 51 and the second air duct 52. Thefirst air duct 51 communicates with the air outlet 3, and the second airduct 52 communicates with the air outlet 4. The fan assembly 22 isreceived in the first air duct 51. The air flowing out of the fanassembly 22 flows through the wind guide tongue 6 to the first air duct51 and the second air duct 52 respectively, such that the air may flowout of the shell 21 from the air outlet 3 and the air outlet 4. The windguide tongue 6 is configured to guide the air flowing directions. Theair flowing out of the fan assembly 22 is directed to the air outlet 3and air outlet 4 respectively after being guided by the wind guidetongue 6, such that the air may flow out of the neck fan from both theair outlet 3 and the air outlet 4, increasing the area covered by theair flowing out of the shell 21, and the structure of the neck fan maybe more appropriate. Further, the wind guide tongue 6 is configured tocontrol the air flowing direction. The wind guide tongue 6 controls theair flowing out of the fan assembly 22 to flow to the air outlet 3 andthe air outlet 4 respectively, such that the air may uniformly flowthrough the air outlet 3 and the air outlet 4, enabling the air flowingintensity at the air outlet 3 and that at the air outlet 4 to be ofequal, improving the user's experience.

FIGS. 77-80 show a neck fan according to another embodiment of thepresent disclosure.

As shown in FIGS. 77-80, an air outlet assembly 80 includes: a firstengaging cover 10, a second engaging cover 20, a battery holder 30, abattery 40 and a fan assembly 50. The second engaging cover 20 isconnected to the first engaging cover 10 by embedding, and the secondengaging cover 20 and the first engaging cover 10 cooperatively define afirst receiving cavity 60. The battery holder 30 is received in thefirst receiving cavity 60. A second receiving cavity 61 is defined bythe battery holder 30 and the second engaging cover 20. A side of thebattery holder 30 facing the first engaging cover 10 defines a firstreceiving slot 31. The battery 40 is received in the first receivingslot 31. The fan assembly 50 is received in the first receiving cavity60. The fan assembly 50 is connected to the second receiving cavity 61,and the fan assembly 50 and the second receiving cavity 61 are disposedon a same side of the battery holder 30.

In air outlet assembly 80 of the present embodiment, the side of thebattery holder 30 facing the first engaging cover 10 defines the firstreceiving slot 31, such that the battery 40 is fixed. The fan assembly50 is received in the first receiving cavity 60, and is connected to thesecond receiving cavity 61, such that the battery 40 and the fanassembly 50 are fixed at two separated layers, allowing the batteryholder 30 to restrict and fix the battery 40 and to facilitate the airout of the fan assembly 50 to flow to the second receiving cavity 61.The fan assembly 50 extends through the battery holder 30, or the fanassembly 50 is located on a same side of the battery holder 30. In thisway, the airflow of fan assembly 50 may be guided to flow between thebattery holder 30 and the second engaging cover 20, optimally utilizingthe space where the fan assembly 50 and the battery holder 30 arearranged, and reducing an impact in an air guiding area of the fanassembly 50 caused by the battery holder 30.

As shown in FIGS. 78-80, in an embodiment, the battery holder 30 furtherincludes a through hole 32. A third receiving cavity 62 is definedbetween the battery holder 30 and the first engaging cover 10. Thesecond receiving cavity 61 is communicated with the third receivingcavity 62 through the through hole 32.

In detail, since the second receiving cavity 61 is communicated to thethird receiving cavity 62 through the through hole 32, the air guidingarea of the fan assembly 50 may be increased, reducing the impact in theair guiding area of the fan assembly 50 caused by the battery holder 30.Further, the battery 40 in the first receiving slot 31 may be cooled,ensuring the battery 40 to be used safely.

As shown in FIGS. 78-80, in an embodiment, the fan assembly 50 isreceived in the through hole 32. The fan assembly 50 is connected to thesecond receiving cavity 61 and the third receiving cavity 62 through thethrough hole 32. An axis of the fan assembly 50 coincides with an axisof the through hole 32.

In detail, the axis of the fan assembly 50 coincides with the axis ofthe through bore 32, such that the air guiding area occupied by the fanassembly 50 may be reduced.

As shown in FIGS. 77-80, in an embodiment, the first engaging cover 10includes a top wall 11 and a third side wall 12. The third side wall 12extends around and is fixed on the top wall 11. The top wall 11 definesa first air inlet 13. The first air inlet hole 13 is covered by a firststopper 14. A first gap 15 is defined between the first stopper 14 andthe top wall 11. The first gap 15 intersects with an axis of the firstair inlet 13. The first receiving cavity 60 is communicated with thefirst gap 15 through the first air inlet 13. The bottom wall 21 definesa second air inlet 24. The second air inlet 24 is covered by a secondstopper 25. A second gap 26 is defined between the second stopper 25 andthe bottom wall 21. The second gap 26 intersects an axis of the secondair inlet 24. The second receiving cavity 61 is communicated to thesecond gap 26 through the second air inlet 24.

In detail, defining the first air inlet 13 and the first gap 15 allowsthe third receiving cavity 62 to receive the external air, and definingthe second air inlet 24 and the second gap 26 allows the secondreceiving cavity 61 to receive external air, such that the fan assembly50 is able to intake the external air. Further, the first stopper 14covers the first air inlet 13, the first gap 15 is defined between thefirst stopper 14 and the top wall 11, and the first gap 15 intersectswith the axis of the first air inlet 13, such that the user's hair orforeign matter may be prevented from being sucked directly into thefirst receiving cavity 60, preventing the user's hair or the foreignmatters from winding the fan assembly 50, ensuring the fan assembly 50to operate normally.

As shown in FIG. 78, the axis of the first inlet 13, the axis of thethrough hole 32 and the axis of the second inlet 24 coincide with eachother, allowing the fan assembly 50 in the through hole 32 to intake theexternal air from the first inlet 13 and the second inlet 24.

Further, the second inlet 24 may also serve as an air outlet, increasingthe area covered by the air flowing out of the air outlet assembly 80.

As shown in FIGS. 78-80, in an embodiment, the second receiving cavity61 receives a plurality of air guide members 70. The air guide members70 abut against the battery holder 30, such that the air guide members70 and the battery holder 30 cooperatively define an air guide channel71. The second engaging cover 20 defines a plurality of air flowingholes 72 communicating with the air guide channel 71.

Defining the air guide channel 71 and the plurality of air flowing holes72 allows the fan assembly 50 to be communicated with the external air,such that the air flowing out of the fan assembly 50 flows to theexternal through the air guide channel 71 and the air flowing holes 72.

In detail, as shown in FIGS. 78-80, in an embodiment, the air guidemember 70 is arranged with a first air guide plate 73 and a second airguide plate 74. A bottom of the first air guide plate 73 and a bottom ofthe second air guide plate 74 are fixed to the second engaging cover 20.A top of the first air guide plate 73 abuts against the battery holder30. A third air guide plate 75 is arranged on and protruding from abottom of the battery holder 30. The second air guide plate 74 and thethird air guide plate 75 abut against each other and cooperativelydefine a fourth air guide plate 76. A gap is defined between the firstair guide plate 73 and the fourth air guide plate 76. The secondengaging cover 20, the first air guide plate 73, the fourth air guideplate 76 and the battery holder 30 cooperatively define the air guidechannel 71. The fan assembly 50 is communicated with the air flowingholes 72 through the air guide channel 71.

The second engaging cover 20, the first air guide plate 73, the fourthair guide plate 76 and the battery holder 30 cooperatively define theair guide channel 71, such that the fan assembly 50 is communicated withthe air flowing holes 72. Further, the second air guide plate 74 abutsagainst the third air guide plate 75, and the second air guide plate 74and the third air guide plate 75 are spliced to serve as the fourth airguide plate 76, ensuring the air guide channel 71 to be used normally.In addition, connection the battery holder 30 and the second engagingcover 20 may be more fixed.

Further, in an embodiment, the second air guide plate 74 is arranged aprotrusion, and the third air guide plate 75 defines a recess. Theprotrusion is inserted to the recess for connection. In this way, thesecond air guide plate 74 and the third air guide plate 75 are splicedtogether to serves as the fourth air guide plate 76.

In detail, as shown in FIG. 80, in some embodiments, the second engagingcover 20 includes a bottom wall 21 and a first side wall 22 and a secondside wall 23. The first side wall 22 and the second side wall 23 extendout of the bottom wall 21 and are opposite to each other. The fourth airguide plate 76 surrounds the fan assembly 50. Each of the first airguide plate 73 and the second air guide plate 74 extends to be fixed tothe bottom wall 21. An end of the second air guide plate 74 is connectedto the first side wall 22, and a gap is defined between the other end ofthe second air guide plate 74 and the second side wall 23. Two ends ofthe first air guide plate 73 is connected to the first side wall 22 andthe second side wall 23 respectively.

In the present embodiment, the end of the second air guide plate 74 isconnected to the first side wall 22, and the gap is defined between theother end of the second air guide plate 74 and the second side wall 23.Further, the second air guide plate 74 abuts against the third air guideplate 75, and the second air guide plate 74 and the third air guideplate 75 are spliced together to serves as the fourth air guide plate76. In this way, the air guide channel 71 may be used normally. Further,the fourth air guide plate 76 surrounds the fan assembly 50, preventingthe fan assembly 50 form communicating with the air flowing holes 72 ina linear straight direction. Therefore, foreign matters are preventedfrom entering through the air flowing holes 72, and that is, the fanassembly 50 may be prevented from being wound by the foreign matters,ensuring the fan assembly 50 to operate normally.

In some embodiments, the plurality of air flowing holes 72 aredistributed on a same side of the fan assembly 50, such that only oneair guide member 70 is arranged.

As shown in FIGS. 77, and 79-80, in an embodiment, the plurality of airflowing holes 72 are divided into two groups, and the two groups aredistributed on two sides of the fan assembly 50, respectively. Each oftwo sides of the fan assembly 50 is arranged with one air guide member70. Further, two corresponding the air guide channels 71 are defined.

In detail, two air guides members 70 on the two sides of the fanassembly 50 have a same structure. Each of the two air guide members 70is formed by the first air guide plate 73 and the fourth air guide plate76. Alternatively, one of the two air guide members 70 is formed by thefirst air guide plate 73 and the fourth air guide plate 76, and theother one of the two air guide members 70 is formed by two first airguide plates 73. A side of the fan assembly 50 is indirectly connectedto a first group of the air flowing holes 72 through the fourth airguide plate 76. The other side of the fan assembly 50 is connected tothe second group of air flowing holes 72 through the first air guideplate 73. In this way, the fan assembly 50 may be prevented from beingwound by the foreign matters, ensuring the fan assembly 50 to operatesafely.

In addition to the above embodiment, each of the first side wall 22 andthe second side wall 23 is arranged with a first embedding member 27.The third side wall 12 is arranged with a second embedding member 16.The first embedding member 27 may be connected to the second embeddingmember 16 by embedding. In this way, the first engaging cover 10 and thesecond engaging cover 20 are connected by embedding.

According to the air outlet assembly 80 in the present disclosure, thebattery 40 is received in the first receiving slot 31, preventing thebattery 40 from shaking in the first receiving cavity 60. The fanassembly 50 is received in the first receiving cavity 60, and the fanassembly 50 and the second receiving cavity 61 are connected, such thatthe battery 40 and the fan assembly 50 are fixed in separated layers. Inthis way, the battery holder 30 may limit and fix the battery 40 andfacilitate the air flowing out of the fan assembly 50 to flow to thesecond receiving cavity 61. The fan assembly 50 extends through thebattery holder 30 or is disposed on a same side of the battery holder30, allowing the air out of the fan assembly to flow between the batteryholder 30 and the second engaging cover 20. In this way, spaces forarranging the fan assembly 50, the battery holder 30, and the like, maybe utilized optimally, reducing the impact in the air guiding area ofthe fan assembly caused by the battery holder 30.

As shown in FIGS. 77-80, the neck fan further includes a suspensionmember 90 and at least one of the above-mentioned air outlet assembly80. The air outlet assembly 80 is arranged on the suspension member 90.

In detail, the battery holder 30 is arranged in the air outlet assembly80, such that the battery 40 and the air guide channel 71 are arrangedin separated layers. In this way, the battery 40 is limited and fixed,and spaces for arranging the fan assembly 50, the battery holder 30, andthe battery 40, may be utilized optimally, reducing the impact in theair guiding area of the fan assembly 50. The battery 40 may be fixedlyarranged, and the fan assembly 50 may be assisted to guide the airflowing.

As shown in FIGS. 77-80, in some embodiments, the neck fan of thepresent disclosure includes two air outlet assemblies 80. The two airoutlet assemblies 80 are arranged at two ends of the suspension member90. In another embodiment, the neck fan of the present disclosureincludes three air outlet assemblies 80. The three air outlet assemblies80 are arranged at each of two ends of the suspension member 90 and at amiddle of the suspension member 90, respectively. In this case, thesuspension member 90 may be arch-shaped. The air guiding area of theneck fan is increased.

As shown in FIGS. 81-86, FIG. 81 is a schematic view of a neck fan 1according to another embodiment of the present disclosure. The neck fan1 may serve as a temperature adjustment apparatus 1 that hangs around auser's neck, FIG. 82 is another schematic view of the temperatureadjustment apparatus 1 shown in FIG. 81, FIG. 83 is an exploded view ofthe temperature adjustment apparatus 1 shown in FIG. 81, FIG. 84 is anexploded view of a middle portion 15 c of the temperature adjustmentapparatus 1 shown in FIG. 81, and FIG. 85 is another exploded view ofthe middle portion 15 c of the temperature adjustment apparatus 1 shownin FIG. 81. The temperature adjustment apparatus 1, which can be worn bya user to hang around the user's neck, includes an arc-shaped shell 10and a movable temperature adjustment assembly 20. FIG. 86 is a diagramof a circuit of the temperature adjustment apparatus 1 shown in FIG. 81.

The arc-shaped shell 10 is wearable around the neck. The arc-shapedshell 10 has a first receiving cavity 11 and a first opening 12communicated with the first receiving cavity 11 and oriented towards theneck. The movable temperature adjustment assembly 20 includes atemperature adjustment member 21 and a driving member 22. Thetemperature adjustment member 21 is mounted corresponding to the firstopening 12. The driving member 22 is connected to the arc-shaped shell10 and the temperature adjustment member 21. The temperature adjustmentmember 21 is configured to absorb heat emitted from the neck, such thatthe temperature adjustment member 21 may cool the neck. In someembodiments, the temperature adjustment member 21 may be configured torelease heat to warm the neck. The driving member 22 is configured todrive the temperature adjustment member 21 to move, such that thetemperature adjustment member 21 may be switched between an extendedstate and a retracted state. In the extended state, the temperatureadjustment member 21 extends out of the first opening 12, furtherextending towards the neck. In the retracted state, at least part of thetemperature adjustment member 21 is retracted through the first opening,such that the temperature adjustment member 21 is received in thereceiving cavity 11, and the temperature adjustment member 21 isseparated from the neck. It shall be understood that, the user may freethe user's hands by wearing the arc-shaped shell 10 around the neck,such that the temperature adjustment apparatus 1 hangs around the neck.In this way, the user's neck may be cooled down and/or warmed up by thetemperature adjustment apparatus 1 while the user is performing otheractivities, such that the temperature is adjusted, and at the same time,the user's experience is improved.

According to the present embodiment, for the temperature adjustmentapparatus 1, the arc-shaped shell 10 has the first receiving cavity 11and the first opening 12 communicated to the first receiving cavity 11.The first opening 12 faces towards the user's neck. The temperatureadjustment member 21 of the movable temperature adjustment assembly 20may extend out of the shell through the first opening 12 and facetowards the neck to absorb heat from the neck to cool the neck and/or torelease heat to warm the neck. In this way, the user may be cooledrapidly at higher temperatures and may be warmed at lower temperatures.Therefore, the temperature adjustment apparatus 1 may be applied tovarious application scenarios, and the user's experience may beimproved. In addition, the shell 10 of the temperature adjustmentapparatus 1 is arc-shaped, the temperature adjustment apparatus 1 may beattached to the neck appropriately, enabling the user to feelcomfortable, and allowing the user to be cooled and warmed quickly(i.e., an efficiency of increasing or decreasing the temperature may beimproved). In addition, the temperature adjustment member 21 is drivenby the driving member 22, such that the temperature adjustment member 21may be switched between the extended state and the retracted state. Inthe extended state, the temperature adjustment member 21 extends out ofthe first opening 12, further extending towards the neck. In theretracted state, at least part of the temperature adjustment member 21is retracted through the first opening, such that the temperatureadjustment member 21 is received in the receiving cavity 11, and thetemperature adjustment member 21 is separated from the neck. In thisway, the temperature adjustment member 21 may be received in the firstreceiving cavity 11 when not in use, improving the user's experience.More specifically, when the temperature adjustment member 21 contactsthe neck for a certain period of time, a temperature of the temperatureadjustment member 21 gradually tends to be the same as a temperature ofthe neck, such that the user may be gradually insensitive, reducing theuser's experience. However, the driving member 22 may control thetemperature adjustment member 21 to be extended or retracted, thetemperature adjustment member 21 may be controlled to touch the neck attime intervals. For example, when the user does not feel about thetemperature adjustment apparatus, the temperature adjustment member 21may be controlled to be in the retracted state for a period of time.When the temperature of the temperature adjustment member 21 isdifferent from the temperature of the neck, then the temperatureadjustment member 21 may be controlled to be extended to contact theneck. In this way, the user may feel an obvious temperature difference,improving the user's experience.

Further, as shown in FIG. 86, the temperature adjustment apparatus 1 mayfurther include a control module 50. The control module 50 iselectrically connected to the driving member 22. The control module 50is configured to control the driving member 22 to drive the temperatureadjustment member 21 to move. The temperature adjustment apparatus 1 mayfurther include a temperature sensor 51. The temperature sensor 51 maybe arranged on the temperature adjustment member 21 to detect thetemperature of the temperature adjustment member 21 and output atemperature detection signal. The control module 50 is configured toreceive the temperature detection signal and control the driving member22 to drive the temperature adjustment member 21 to move based on thetemperature detection signal. The control module 50 is configured todetermine whether the temperature of the temperature adjustment member21 is greater than or equal to a predetermined temperature based on thetemperature detection signal. When the temperature of the temperatureadjustment member 21 is greater than or equal to the predeterminedtemperature, the control module 50 controls the driving member 22 todrive the temperature adjustment member 21 to enter and stay in theretracted state. When the temperature of the temperature adjustmentmember 21 is less than or equal to the predetermined temperature, thecontrol module 50 controls the driving member 22 to drive thetemperature adjustment member 21 to enter and stay in the extendedstate. It shall be understood that the control module 50 may control thedriving member 22 to drive the temperature adjustment member 21 to move,such as controlling the temperature adjustment member 21 to extend orretract periodically. Alternatively, the driving member may drive thetemperature adjustment member 21 to extend or retract based on theuser's instructions or preferences (such as a button pressed by theuser, a voice instruction, a gesture instruction, and so on). In thisway, demands of various users may be satisfied, improving the user'sexperience. Further, the temperature sensor 51 detects the temperatureof the temperature adjustment member 21 and controls the temperatureadjustment member 21 to be extended or retracted based on thetemperature of the temperature adjustment member 21. In this way, thetemperature adjustment member 21 may be controlled in a more intelligentmanner, improving the user's experience.

Further, the temperature adjustment member 21 includes a semiconductorcooler 211. The semiconductor cooler 211 includes a semiconductorcooling structure 211 a, a thermal conductor 211 b, and a heatdissipator 211 c. The thermal conductor 211 b is connected to a cool endof the semiconductor cooling structure 211 a and is configured tocontact the user's neck. The heat dissipator 211 c is connected to awarm end of the semiconductor cooling structure 211 a. The thermalconductor 211 b includes a metal thermal conductor 211 b. The heatdissipator 211 c includes a plurality of heat dissipating fins 211 e.The temperature adjustment member 21 further includes a first slidingstructure 212 arranged on the semiconductor cooler 211. For example, inthe present embodiment, at least two first sliding structures 212 may bearranged. The arc-shaped shell is arranged with a second slidingstructures 13 corresponding to the first sliding structure 212. Forexample, in the present embodiment, at least two second slidingstructures 212 may be arranged. The driving member 22 is configured todrive the temperature adjustment member 21, such that the first slidingstructure 212 slides relative to the second sliding structure 13, andtherefore, the temperature adjustment member 21 is switched between theextended state and the retracted state. One of the first slidingstructure 212 and the second sliding structure 13 includes a slidegroove, and the other one of the first sliding structure 212 and thesecond sliding structure 13 includes a slide block. The slide block maybe received in the slide groove and slidable along the slide groove. Thenumber of first sliding structures 212 may be two, and the number ofsecond sliding structures 13 may be two. The two first slidingstructures 212 may be opposite to each other. In the present embodiment,the second sliding structure 13 defines a slide groove. The firstsliding structure 212 includes a slide block. The slide block may bereceived in the slide groove and slidable along the slide groove. Whenthe temperature is low, and the user needs to be warmed, the firstsliding structure 212 slides out of the second sliding structure 13,such that the temperature adjustment member 21 is in the extended stateand near the neck, and the neck is warmed by the thermal conductor 211b. When the temperature is high, and the user needs to be cooled, thefirst sliding structure 212 slides out of the second sliding structure13, such that the temperature adjustment member 21 is in the extendedstate and close to the neck, the warm may be cooled by the heatdissipator 211 c. When the neck temperature adjustment apparatus 1 isnot in use, the first sliding structure 212 slides into the secondsliding structure 13, such that the temperature adjustment member 21 isin the retracted state, and the temperature adjustment apparatus may beeasily stored and carried. According to the present embodiment, thethermal conductor 211 b includes the metal thermal conductor 211 b. Theheat dissipator 211 c includes the plurality of heat dissipating fins211 e, a heat conducting efficiency and a heat dissipating efficiencymay be increased, such that the user may be cooled or warmed quickly. Inaddition, since two first sliding structures 212 are arrangedoppositely, and two second sliding structures 13 are arrangedoppositely, the temperature adjustment member 21 may be stable whilebeing lifted and lowered. One of the first sliding structure 212 and thesecond sliding structure 13 includes the slide groove, and the other ofthe first sliding structure 212 and the second sliding structure 13includes the slide block. The slide block may be received in the slidegroove and slidable along the slide groove. The slide block sliding inthe slide groove allows the first sliding structure 212 to slide stablyin the second sliding structure 13.

Further, the driving member 22 includes a motor 221 and a motor shaft222 connected to the motor 221. The motor 221 is fixed to the arc-shapedshell 10. The motor shaft 222 has an external thread. The temperatureadjustment member 21 defines a thread hole 213. The external thread ofthe motor shaft 222 engages with an internal thread arranged on a wallof the thread hole 213. In this way, when the motor 221 drives the motorshaft 222 to rotate, the temperature adjustment member 21 moves alongthe motor shaft 222, such that the temperature adjustment member isswitched between the extended state and the retracted state. The motor221 may be a stepper motor 221. In the present embodiment, the drivingmember 22 includes the motor 221 and the motor shaft 222 connected tothe motor 221. The motor 221 is fixed to the arc-shaped shell 10. Themotor shaft 222 has the external thread. The temperature adjustmentmember 21 defines the thread hole 213. The external thread of the motorshaft 222 engages with the internal thread arranged on the wall of thethread hole 213. In this way, the driving member 22, the temperatureadjustment member 21, and the arc-shaped shell 10 are fixedly connectedwith each other. In addition, the thread of the motor shaft 222 engageswith the inner thread of the thread hole 213, such that the motor 221controls the temperature adjustment member 21 to be extended andretracted. The structure of the temperature adjustment apparatus may besimplified and may be manipulated stably.

Further, the arc-shaped shell further defines a plurality of firstthrough holes 14 a. The plurality of first through holes 14 a aredistributed surrounding an outer periphery of the first opening 12. Thearc-shaped shell further defines a plurality of second through holes 14b located on a side of the movable temperature adjustment assembly 20away from the neck. The temperature adjustment apparatus 1 furtherincludes a first fan assembly 30. The first fan assembly 30 is receivedin the first receiving cavity 11 and is disposed on the side of themovable temperature adjustment assembly 20 away from the neck. The firstfan assembly 30 is configured to blow air towards the first throughholes 14 a and/or the second through holes 14 b. The first fan assembly30 is disposed corresponding to a middle region of the movabletemperature adjustment assembly 20. The first fan assembly 30 includes afirst mounting member 31 and a first blade assembly 32. The firstmounting member 31 has a first mounting body 311 and a first mountingshaft 312. The first mounting body 311 is connected to the arc-shapedshell 10. The first mounting shaft 312 is connected to a side of thefirst mounting body 311 near the movable temperature adjustment assembly20. The blade assembly is mounted on the first mounting shaft 312. Whenthe temperatures is high, and when the user needs to be cooled, thefirst fan assembly 30 blows out wind through the second through holes 14b to dissipate heat generated from the heat dissipator 211 c, allowingthe heat dissipator 211 c to be cooled quickly. When the temperature islow, and when the user needs to be warmed, the fan assembly 30 blows outhot air through the through holes 14 a, allowing the thermal conductor211 b to conduct heat to the user. According to the present embodiment,the fan assembly 30 is arranged to operate together with the temperatureadjustment member 21. When the user needs to be cooled, the wind isblown to the second through holes 14 b, increasing a heat dissipatingefficiency. When the user needs to be warmed, the hot air is blown tothe first through holes 14 a, increasing a thermal conductingefficiency. In this way, the user may feel comfortable in varioustemperature.

Further, the arc-shaped shell includes a first portion 15 a, a secondportion 15 b and a middle portion 15 c connected between the firstportion 15 a and the second portion 15 b. The middle portion 15 cdefines the first receiving cavity 11 and the first opening 12. Thefirst portion 15 a and the second portion 15 b are configured to belocated on two opposite sides of the neck. The middle portion 15 cextends in an arc direction and includes a first arc member 151 and asecond arc member 152. The first arc member may be near the neck whenthe shell is worn to the user. The second arc member 152 may be awayfrom the neck when the shell is worn to the user. A cross section of thefirst arc member 151 taken by a plane perpendicular to the arc directionmay be arc shaped, protruding towards the user's neck. A cross sectionof the second arc member 152 taken by the plane perpendicular to the arcdirection may be arc shaped, protruding away from the user's neck. Aspace between the first arc member 151 and the second arc member 152 maybe the first receiving cavity 11. The first opening 12 extends throughthe first arc member 151 and communicates with the first receivingcavity 11. Since the cross section of the first arc member 151 taken bythe plane perpendicular to the arc direction may be arc shaped,protruding towards the user's neck, and the cross section of the secondarc member 152 taken by the plane perpendicular to the arc direction maybe arc shaped, protruding away from the user's neck, the user may feelcomfortable when wearing the temperature adjustment apparatus 1 aroundthe neck.

Further, the middle portion 15 c further includes a ring-shapedextending plate 17. The extending plate 17 is connected to a side of thesecond arc member 152 near the first arc member 151. The extending plate17 may be disposed to surround an outer periphery of the movabletemperature adjustment apparatus. The arc-shaped shell 10 may furtherinclude a first connection member 16 a and a second connection member 16b. The first connection member 16 a may be connected between the firstportion 15 a and the middle portion 15 c. The second connection member16 b may be connected between the second portion 15 b and the middleportion 15 c. According to the present embodiment, the middle portion 15c further includes the ring-shaped extending plate 17. The extendingplate 17 is connected to the side of the second arc member 152 near thefirst arc member 151. The extending plate 17 may be disposed to surroundthe outer periphery of the movable temperature adjustment assembly 20.In this way, a position of the movable temperature adjustment assembly20 may be restricted, ensuring the temperature adjustment assembly 20 tobe stability and accurately switched between the extended state and theretracted state.

Further, each of the first portion 15 a and the second portion 15 bdefines a second receiving cavity 18. Each of the first portion 15 a andthe second portion 15 b defines an air inlet 153 and an air outlet 154.The air inlet 153 and the air outlet 154 may be communicated with thesecond receiving cavity 18. The temperature adjustment apparatus 1 mayfurther include at least two fan assemblies 40. Each of the secondreceiving cavity 18 of the first portion 15 a and the second receivingcavity 18 of the second portion 15 b receives one of the at least twofan assemblies 40. Each fan assembly 40 is configured to drive the airfrom the air inlet 153 to flow to the corresponding air outlet 154.Since the fan assembly 40 drives the air from the air inlet 153 to flowto the corresponding air outlet 154, the user may be cooled quickly,increasing the efficiency of reducing the temperature.

Further, each of the first connection member 16 a and the secondconnection member 16 b includes a through hole 160, extending throughthe first connection member 16 a and the second connection member 16 b,respectively. The through hole 160 of the first connection member 16 ais communicated between the second receiving cavity 18 of the firstportion 15 a and the first receiving cavity 11. The through hole 160 ofthe second connection member 16 b is communicated between the secondreceiving cavity 18 of the second portion 15 b and the first receivingcavity 11. Each of the fan assembly 40 in the first portion 15 a and thefan assembly 40 in the second portion 15 b is further configured todrive the air from the air inlet 153 to flow through the correspondingsecond receiving cavity 18, the corresponding through hole 160, thefirst receiving cavity 11, to reach the first through holes 14 a. Itshall be understood that, defining the through hole 160 allows the airin the first portion 15 a and the second portion 15 b to flow throughthe through hole 160 to reach the first receiving cavity 11.Subsequently, the air is further blown out of the shell through thefirst through holes 14 a of the middle portion 15 c. In this way, theneck may be cooled effectively. In addition, a wind guide plate 161 maybe received in the first receiving cavity 11 of the middle portion 15 c.The wind guide plate 161 is further configured to guide the air from thethrough hole 160 to flow to the first through hole 14 a, allowing theair to be blown out, increasing the air out flowing efficiency.

Further, the second fan assembly 40 includes turbine blades 41 rotatingin a predetermined direction. The air inlet 153 may include a first airinlet 153 a and a second air inlet 153 b. The first air inlet 153 a andthe second air inlet 153 b are arranged along the predetermineddirection, and are disposed between two opposite sides of the second fanassembly 40. Each of the first portion 15 a and the second portion 15 bincludes an inner wall 155, an outer wall 156, and a connection wall159. The inner wall 155, the outer wall 156, and the connection wall 159cooperatively define the second receiving cavity 18. The outer wall 156is opposite to the inner wall 155. The connection wall 159 is connectedbetween the inner wall 155 and the outer wall 156. The first air inlet153 a is defined in the inner wall 155. The second air inlet 153 b isdefined in the outer wall 156. The connection wall 159 includes a topwall 159 a facing towards the user's head. The air outlet 154 is definedin the top wall 159 a. In the present embodiment, a plurality of airoutlets 154 are defined. A first portion of the plurality of air outlets154 are distributed near the middle portion 15 c, and a second portionof the plurality of air outlets 154 are distributed away from the middleportion 15 c. A size of the first portion of the plurality of airoutlets 154 is less than a size of the second portion of the pluralityof air outlets 154. Turbine blades 41 of two second fan assemblies 40may intake air from the first air inlets 153 a and the second air inlets153 b at the same time, and drive the air to flow along an air duct inthe first portion 15 a and an air duct in the second portion 15 brespectively, reaching the air outlets 154. The air may be blown out ofthe air outlets 154 to directly flow towards the user's head, enablingthe user to be cooled efficiently. According to the present embodiment,the first air inlet 153 a and the second air inlet 153 b are defined toincrease an amount of the air to be intaken, such that an air outflowing efficiency of the second fan assembly 40 may be increased. Inthe present embodiment, the plurality of air outlets 154 are defined.The size of the first portion of the air outlets 154 near the middleportion 15 c is less than a size of the second portion of the airoutlets 154 away from the middle portion 15 c. In this way, the air outflowing efficiency is increased, the hair and other foreign matters maynot be easily caught by the second fan assembly 40, increasing theuser's safety.

Further, each of the first portion 15 a and the second portion 15 bincludes a first cover 157. A surface of the inner wall 155 facing theuser's neck has a first mounting portion 155 a. The first cover 157 andthe first mounting portion 155 a are mounted fixedly. The first cover157 covers the first air inlet 153 a. The first cover 157 defines aplurality of air inlets 157 a. The plurality of air inlets 157 acorrespond to the plurality of first air inlets 153 a and aredistributed in a ring shape. Each of the first portion 15 a and thesecond portion 15 b includes a second cover 158. A surface of the outerwall 156 away from the neck has a second mounting portion 156 a. Thesecond cover 158 and the second mounting portion 156 a are mountedfixedly. The second cover 158 covers the second air inlet 153 b. An airinlet 155 b is defined between an edge of the second cover 158 and thefirst portion 15 a and between the edge of the second cover 158 and thesecond portion 15 b. In this way, the air at an outer side of thetemperature adjustment apparatus 1 flows through the air inlet 155 b toreach the second air inlet 153 b. Since the air inlet 155 b is definedbetween the edge of the second cover 158 and the first portion 15 a andbetween the edge of the second cover 158 and the second portion 15 b,the air that is to be blown out of the shell may be compressedoptimally, an air pressure near the second air inlet 153 b may begreater than an air pressure inside the second receiving cavity 18, suchthat a negative pressure is generated to push the air out of the secondair inlet 153 b to the second air inlet 153 b, increasing an airintaking rate. Since the air inlet 155 b is defined between the edge ofthe second cover 158 and the first portion 15 a and between the edge ofthe second cover 158 and the second portion 15 b, the air intaking rateis increased, and the hair and other foreign matters may not be easilycaught by the second fan assembly 40, improving the user's safety.

Further, the first mounting portion 155 a includes a first slot portion155 c and a first fastening portion 155 d. The first air inlet 153 a isdefined in a bottom wall of the first slot portion 155 c. The firstfastening portion 155 d is arranged on the first slot portion 155 c. Thefirst cover 157 is arranged with a second fastening portion 157 d,fastening with the first fastening portion 155 d. The second mountingportion 156 a includes a second slot portion 156 b and a third fasteningportion 156 c. The second air inlet 153 b is defined in a bottom wall ofthe second slot portion 156 b. The third fastening portion 156 c isarranged on the second slot portion 156 b. The second cover 158 isarranged with a fourth fastening portion 158 a, fastening with the thirdfastening portion 156 c. The arc-shaped shell may include a wind guideplate arranged inside the first portion 15 a and another wind guideplate arranged inside the second portion 15 b. The wind guide plate anda wall of the first portion 15 a cooperatively defines an air duct, andthe another wind guide plate and a wall of the second portion 15 bcooperatively defines another air duct. In this way, the second fanassembly 40 may drive the air from the air inlet 153 to flow through theair duct to reach the air outlet 154. In the present embodiment, thefirst fastening portion 155 d, the second fastening portion 157 b, thethird fastening portion 156 c, and the fourth fastening portion 158 aare arranged to allow the first mounting portion 155 a to be fastenedwith the first cover 157 and to allow the second mounting portion 156 ato be fastened with the second cover 158. The shell may be assembledeasily, and the connection may be stable. Further, wind guide plates arearranged to define the air duct in each of the first portion 15 a andthe second portion 15 b. The air duct may guide the wind generated bythe fan assembly 40, increasing the air out flowing efficiency of thesecond fan assembly 40.

The above description is only specific implementation of the presentdisclosure, but the scope of the present disclosure is not limitedthereto. Variations or substitutions that is raised by any ordinaryskilled person in the art shall be included in the scope disclosed ofthe present disclosure. Therefore, the scope of the present disclosureshall be subject to the scope of the appended claims.

1. A neck fan, comprising: an arc-shaped shell, configured to be wornaround a neck of a user, wherein the shell comprises a wall defining areceiving space, and the wall comprises a first side wall close to theneck and a second side wall connected to and opposite to the first sidewall; and each of the first side wall and the second side wall defines aplurality of air inlets, at least one of the first side wall and thesecond side wall defines a plurality of air outlets, and the pluralityof air inlets and the plurality of air outlets are communicating withthe receiving space; a fan assembly, received in the receiving space ofthe shell, wherein the fan assembly comprises a driving shaft and a fanblade assembly mounted on the driving shaft; the fan blade assembly is aturbine blade assembly; and the turbine blade assembly comprises aturbine fan, and the turbine fan defines two inlet windows correspondingto the air inlets of the first side wall and the second side wallrespectively; wherein the receiving space comprises a first air duct anda second air duct corresponding to the fan assembly, the plurality ofair outlets comprise a first air outlet and a second air outletcorresponding to the fan assembly; the first air duct and the first airoutlet are located at a first side of the fan assembly; and the secondair duct and the second air outlet are located at a second side of thefan assembly; and the fan assembly is configured to drive the air fromthe plurality of air inlets in the first side wall and the second sidewall to flow through the first air duct and the second air duct to reachthe first air outlet and the second air outlet.
 2. The neck fanaccording to claim 1, wherein the arc-shaped shell comprises a firstportion configured to be worn around a side of the neck and a secondportion configured to be worn around another side of the neck, thereceiving space comprises a first receiving space and a second receivingspace, the first receiving space is defined in the first portion, andthe second receiving space is defined in the second portion; the neckfan further comprises a partition, received in each of the firstreceiving space and the second receiving space, wherein the partition isconfigured to divide each of the first receiving space and the secondreceiving space into at least two receiving sub-spaces, wherein the atleast two receiving sub-spaces are distributed along an extensiondirection of the arc-shaped shell; wherein each of the first air ductand the second air duct is defined by the partition and the wallcooperatively; and a cross-sectional area of each of the first air ductand the second air duct is gradually decreased along a direction awayfrom the fan assembly.
 3. The neck fan according to claim 1, wherein,the second air outlet comprises a first sub-outlet and a secondsub-outlet, the first sub-outlet and the second sub-outlet are locatedon the second side of the fan assembly; and the neck fan furthercomprises a first wind guide member, a second wind guide member, and awind guide tongue; the first air guide member is connected to a portionof the wall that defines the first sub-outlet, and an end of the firstair guide member is disposed near the first sub-outlet; the second airguide member is connected to another portion of the wall that definesthe second sub-outlet, and an end of the second air guide member isdisposed near the second sub-outlet; the first air guide member isconfigured to guide the air to flow to the first sub-outlet, and thesecond air guide member is configured to guide the air to flow to thesecond sub-outlet; and the wind guide tongue is received in thereceiving space and surrounds the fan assembly; and the first air outletand the fan assembly are disposed at two opposite sides of the windguide tongue.
 4. The neck fan according to claim 1, further comprising acover, disposed on a side of the second side wall away from the firstside wall and corresponding to at least one of the air inlets in thesecond side wall; wherein a gap is defined between an edge of the coverand the second side wall and is communicated with the corresponding airinlet; the cover is configured in a first mounting state or in a secondmounting state; in the first mounting state, the cover is configured toallow the air to enter the fan assembly through the gap and the airinlet in the second side wall; in the second mounting state, the coveris configured to block the gap and the air inlet in the second sidewall; and the cover is capable of being switched between the firstmounting state and the second mounting state.
 5. The neck fan accordingto claim 1, wherein, the shell comprises a first shell, a second shell,and a third shell, the first shell and the second shell are opposite toeach other and are configured to face two opposite sides of the neck,the third shell is disposed between and connected to the first shell andthe second shell; the receiving space comprises a first sub-space, asecond sub-space, and a third sub-space, the first sub-space is definedin the first shell, the second sub-space is defined in the second shell,and the third sub-space is defined in the third shell; each of the firstshell, the second shell, and the third shell defines at least one of theplurality of air inlets and at least one of the plurality of airoutlets; the fan assembly comprises a first fan assembly, a second fanassembly and a third fan assembly; the first fan assembly is received inthe first sub-space and is configured to drive the air to flow from theat least one of the plurality of air inlets in the first sub-space toflow to the at least one of the plurality of air outlets in the firstsub-space; the second fan assembly is received in the second sub-spaceand is configured to drive the air to flow from the at least one of theplurality of air inlets in the second sub-space to flow to the at leastone of the plurality of air outlets in the second sub-space; and thethird fan assembly is received in the third sub-space and is configuredto drive the air to flow from the at least one of the plurality of airinlets in the third sub-space to flow to the at least one of theplurality of air outlets in the third sub-space.
 6. The neck fanaccording to claim 1, further comprising a battery holder and a battery,wherein, the battery holder is received in the receiving space; thebattery holder and the first side wall cooperatively define a cavity; aside of the battery holder facing the second side wall defines a slot;the battery is received in the slot; the fan assembly is mounted on thefirst side wall and received in the cavity; and the neck fan furthercomprises at least one partition received in the cavity; wherein thefirst air duct or the second air duct is defined by the at least onepartition, the battery holder and the first side wall cooperatively; anda cross-sectional area of each of the first air duct and the second airduct is gradually decreased along a direction away from the fanassembly.
 7. The neck fan according to claim 1, wherein, the shellcomprises a first shell, a second shell, and a third shell, the thirdshell is disposed between and connected to the first shell and thesecond shell; each of two opposite ends of the third shell is arrangedwith an angle adjustment assembly; the third shell is connected to eachof the first shell and the second shell through the angle adjustmentassembly; and the angle adjustment assembly is configured to adjust anangle between the first shell and the third shell and an angle betweenthe second shell and the third shell.
 8. The neck fan according to claim1, further comprising: an outlet adjustment plate, received in one ofthe plurality of air outlets and movably connected to the shell; and adriving assembly, received in the receiving space, connected to theoutlet adjustment plate, and configured to drive the outlet adjustmentplate to move with respect to the shell.
 9. A neck fan, comprising: anarc-shaped shell, configured to be worn around a neck of a user,wherein, the shell has a first side and a second side opposite to thefirst side, the first side and the second side are connected with eachother and cooperatively define a receiving space; each of the first sideand the second side defines a plurality of air inlets, at least one ofthe first side and the second side defines a plurality of air outlets,and the plurality of air inlets and the plurality of air outlets arecommunicating with the receiving space; a fan assembly, received in thereceiving space, wherein the fan assembly comprises a driving shaft anda fan blade assembly mounted on the driving shaft; the fan bladeassembly is a turbine blade assembly; and the turbine blade assemblycomprises a turbine fan, and the turbine fan defines two inlet windowscorresponding to the air inlets of the first side and the second siderespectively, wherein the fan assembly is configured to drive air fromthe plurality of air inlets of the first side and the second side toflow to the plurality of air outlets, wherein the shell comprises afirst shell, a second shell, and a third shell, the third shell isdisposed between and connected to the first shell and the second shell;each of two opposite ends of the third shell is arranged with an angleadjustment assembly; the third shell is connected to each of the firstshell and the second shell through the angle adjustment assembly; andthe angle adjustment assembly is configured to adjust an angle betweenthe first shell and the third shell and an angle between the secondshell and the third shell.
 10. The neck fan according to claim 9,wherein, the receiving space comprises a first sub-space, a secondsub-space, and a third sub-space, the first sub-space is defined in thefirst shell, the second sub-space is defined in the second shell, andthe third sub-space is defined in the third shell; each of the firstshell, the second shell, and the third shell defines at least one of theplurality of air inlets and at least one of the plurality of airoutlets; the fan assembly comprises a first fan assembly, a second fanassembly and a third fan assembly; the first fan assembly is received inthe first sub-space and is configured to drive the air to flow from theat least one of the plurality of air inlets in the first sub-space toflow to the at least one of the plurality of air outlets in the firstsub-space; the second fan assembly is received in the second sub-spaceand is configured to drive the air to flow from the at least one of theplurality of air inlets in the second sub-space to flow to the at leastone of the plurality of air outlets in the second sub-space; and thethird fan assembly is received in the third sub-space and is configuredto drive the air to flow from the at least one of the plurality of airinlets in the third sub-space to flow to the at least one of theplurality of air outlets in the third sub-space.
 11. The neck fanaccording to claim 9, wherein, the third shell has a first end facefacing the first shell and a second end face facing the second shell;the first shell has an end face facing the third shell, the second shellhas an end face facing the third shell; one of the first end face andthe end face of the first shell is a concaved face, and the other one ofthe first end face and the end face of the first shell is a convex face,when the first shell is connected to the third shell, the convex facefits with and attaches to the concaved face, and an outer surface of thethird shell aligns with an outer surface of the first shell; and one ofthe second end face and the end face of the second shell is a concavedface, and the other one of the second end face and the end face of thesecond shell is a convex face, when the second shell is connected to thethird shell, the convex face fits with and attaches to the concavedface, and an outer surface of the third shell aligns with an outersurface of the second shell.
 12. The neck fan according to claim 9,further comprising: an outlet adjustment plate, received in one of theplurality of air outlets near an end portion of the shell and movablyconnected to the shell; and a driving assembly, received in thereceiving space, connected to the outlet adjustment plate, andconfigured to drive the outlet adjustment plate to move with respect tothe shell.
 13. The neck fan according to claim 9, wherein, when the neckfan is worn by the user, the first side is configured to face shouldersof the user, and the second side is configured to face away from theshoulders; the plurality of air inlets comprise at least one air inletfacing the shoulders and at least one air inlet facing away from theshoulders; and the fan assembly is configured to intake the air from theat least one air inlet facing the shoulders and from the at least oneair inlet facing away from the shoulders.
 14. A neck fan, comprising: anarc-shaped shell, configured to be worn around a neck of a user,wherein, the shell has a first side and a second side opposite to thefirst side, the first side and the second side are connected with eachother and cooperatively define a receiving space; each of the first sideand the second side defines a plurality of air inlets, at least one ofthe first side and the second side defines a plurality of air outlets,and the plurality of air inlets and the plurality of air outlets arecommunicating with the receiving space; an inner shell, received in thereceiving space and defining an inner space, wherein the inner spacecommunicates with the receiving space, the plurality of air outlets, andthe plurality of air inlets; the inner shell has two opposite sides,each of the two opposite sides defines at least one air inlet; a fanassembly, received in the inner space, wherein the fan assembly isconfigured to drive air from the at least one air inlet in each of thetwo opposite sides of the inner shell to flow through the inner spaceand the receiving space to reach the plurality of air outlets; wherein,the air is capable of entering the plurality of air inlets of the shellalong a first flowing direction, the air is capable of entering the atleast of air inlet of the inner shell along a second flowing direction;and an angle between the first flowing direction and the second flowingdirection is in a range of 0° to 90°.
 15. The neck fan according toclaim 14, further comprising a shaking absorption member, received inthe receiving space and configured to connect the shell and the innershell; the fan assembly comprises a driving shaft and a fan bladeassembly mounted on the driving shaft; the fan blade assembly is aturbine blade assembly; and the turbine blade assembly comprises aturbine fan, and the turbine fan defines two inlet windows correspondingto the air inlets of the two opposite sides of the inner shell; anoutlet adjustment plate, received in one of the plurality of air outletsnear an end portion of the shell and movably connected to the shell; anda driving assembly, received in the receiving space, connected to theoutlet adjustment plate, and configured to drive the outlet adjustmentplate to move with respect to the shell.
 16. A neck fan, comprising: anarc-shaped shell, configured to be worn around a neck of a user,wherein, the shell has a first side and a second side opposite to thefirst side, the first side and the second side are connected with eachother and cooperatively define a receiving space; each of the first sideand the second side defines a plurality of air inlets, at least one ofthe first side and the second side defines a plurality of air outlets,and the plurality of air inlets and the plurality of air outlets arecommunicating with the receiving space; a fan assembly, received in thereceiving space, wherein the fan assembly comprises a driving shaft anda fan blade assembly mounted on the driving shaft; the fan bladeassembly is a turbine blade assembly; and the turbine blade assemblycomprises a turbine fan, and the turbine fan defines two inlet windowscorresponding to the air inlets of the first side and the second siderespectively, wherein the fan assembly is configured to drive air fromthe plurality of air inlets of the first side and the second side toflow to the plurality of air outlets, wherein the shell comprises afirst shell, a second shell, and a third shell, the third shell isdisposed between and connected to the first shell and the second shell;the receiving space comprises a first sub-space, a second sub-space, anda third sub-space, the first sub-space is defined in the first shell,the second sub-space is defined in the second shell, and the thirdsub-space is defined in the third shell; each of the first shell, thesecond shell, and the third shell defines at least one of the pluralityof air inlets and at least one of the plurality of air outlets; the fanassembly comprises a first fan assembly, a second fan assembly and athird fan assembly; the first fan assembly is received in the firstsub-space and is configured to drive the air to flow from the at leastone of the plurality of air inlets in the first sub-space to flow to theat least one of the plurality of air outlets in the first sub-space; thesecond fan assembly is received in the second sub-space and isconfigured to drive the air to flow from the at least one of theplurality of air inlets in the second sub-space to flow to the at leastone of the plurality of air outlets in the second sub-space; and thethird fan assembly is received in the third sub-space and is configuredto drive the air to flow from the at least one of the plurality of airinlets in the third sub-space to flow to the at least one of theplurality of air outlets in the third sub-space.
 17. The neck fanaccording to claim 16, further comprising: at least one partition,received in the receiving space and dividing the receiving space into atleast two receiving sub-spaces, wherein the at least two receivingsub-spaces are distributed along an extension direction of thearc-shaped shell; and the fan assembly comprises at least two fanassemblies and a second fan assembly, wherein each of the at least twofan assemblies is received in each of the at least two receivingsub-spaces respectively and configured to guide air to flow from theplurality of air inlets to the plurality of air outlets; wherein the atleast one partition and the wall cooperatively define an air duct; and across-sectional area of the air duct of the first portion is graduallydecreased along a direction an end portion of the shell to a middleportion of the shell away from the end portion.
 18. A neck fan,comprising: an arc-shaped shell, configured to be worn around a neck ofa user, wherein, the shell has a first side and a second side oppositeto the first side, the first side and the second side are connected witheach other and cooperatively define a receiving space; each of the firstside and the second side defines an air inlet, at least one of the firstside and the second side defines a plurality of air outlets, and the airinlet and the plurality of air outlets are communicating with thereceiving space; a fan assembly, received in the receiving space,wherein the fan assembly comprises a driving shaft and a fan bladeassembly mounted on the driving shaft; the fan blade assembly is aturbine blade assembly; and the turbine blade assembly comprises aturbine fan, and the turbine fan defines two inlet windows correspondingto the air inlet of the first side and the air inlet of the second siderespectively, wherein the fan assembly is configured to drive air fromthe air inlet of the first side and the air inlet of the second side toflow to the plurality of air outlets, a temperature adjustment assembly,comprising: a temperature adjustment member, received in the receivingspace of the shell and configured to cool or warm the neck.
 19. The neckfan according to claim 18, wherein, the second side wall defines anopening; the temperature adjustment member comprises a semiconductorcooler, the semiconductor cooler is configured to reduce a temperatureand generate heat; the fan assembly is further configured to drive theair to flow along the receiving space to reach the semiconductor cooler,carrying the generated heat, to further flow out of the shell throughthe opening.
 20. The neck fan according to claim 18, wherein, the airinlet defined in the first side wall comprises a plurality of firstsub-inlets, the air inlet defined in the second side wall comprises aplurality of second sub-inlets; and one of the two inlet windowscorresponds to the plurality of first sub-inlets, and the other one ofthe two inlet windows corresponds to plurality of second sub-inlets.